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Epigenetics 8, 534–541. First evidence of DNA methylation in insect Tribolium castaneum: Environmental regulation of DNA methylation with heterochromatin 2013

Feliciello, I., Parazajder, J., Akrap, I. and Ugarović, Ð.

Notes: GoTaq® Green Master Mix was used to amplify Tribolium castaneum  satellite DNA that had been bisulfite treated to detect methylated cytosines. The bisulfite-treated satellite DNA was amplified using methyl-specific primers in a total volume of 30µl using 2X GoTaq® Green Master Mix, 2mM mix of the primer sets, and 1µl of the bisulfite modified DNA.

  (4356)

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Folia Microbiol. 58, 623–30. Detection and quantification of probiotic strain Lactobacillus gasseri K7 in faecal samples by targeting bacteriocin genes. 2013

Treven, P., Turkova, K., Trmčić, A., Obermajer, T., Rogelj, I. and Matijašić, B.B.

Notes: The authors were interested in quantitating the presence as well as the prevalence of Lactobacillus gasseri K7 in humans that did not consume the probiotic bacteria. Fecal samples from 45 healthy adults were collected, frozen, diluted, centrifuged and digested with proteases. After sonication, DNA was extracted using the Maxwell® 16 Tissue DNA Purification kit on the Maxwell® 16 instrument. This same kit and instrument also were used to isolate bacterial DNA from 1ml bacterial cultures. The purified DNA was PCR amplified using primers for gassericin K7 A and K7 B (bacteriocin) genes and GoTaq® Flexi DNA Polymerase in Green GoTaq® Flexi Buffer for 30 cycles. PCR products were analyzed by 1.8 % agarose gel electrophoresis. (4522)

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J. Gen. Virol. 93, 2408–18. Evolution of the hepatitis E virus hypervariable region. 2012

Smith, D.B., Vanek, J., Ramalingam, S., Johannessen, I., Templeton, K. and Simmonds, P.

Notes: The authors of this study investigated the function of the hypervariable region (HVR) present in open reading frame 1 (ORF1) in the hepatitis E virus (HEV) by measuring the diversity of the HVR in HEV samples from acutely infected patients and in epidemiologically related samples. They sequenced HEV HVR PCR products from limited dilution cDNA from 8 patients PCR positive for ORF2 of HEV. HEV RNA was extracted from serum using a commercial kit, and then HEV RNA was amplified using the Access RT-PCR System. A second round of PCR was performed using GoTaq® polymerase. cDNA was generated using random hexamer or appropriate primers in the presence of Recombinant RNasin® Ribonuclease Inhibitor. (4242)

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Cancer Res. 72, 810-820. SMYD3 Promotes Cancer Invasion by Epigenetic Upregulation of the Metalloproteinase MMP-9. 2012

Cock-Rada, A.M., Medjkane, S., Janski, N., Yousfi, N., Perichon, M., Chaussepied, M., Chluba, J., Langsley, G., and Weitzman, J.B.

Notes: These authors investigated the role of matrix metalloproteinase (MMP-9) in a reversible model of cancer that is initiated by infection with intracellular Theileria parasites. They found that gene induction by parasite infection was associated with trimethylation of histone H3K4 (H3K4me3) at the MMP-9 promoter. The H3K4 methyltransferase SMYD3 was the only histone methyltransferase upregulated upon infection. They therefore investigated the role of SMYD3 overexpression on MMP-9 expression and cell migration, identifying SMYD3 as an important new regulator of MMP-9 transcription. During the study they used the GloMax® Multi Luminometer to measure luminescence and absorbance in reporter and cell viability assays. They also used the Dual-Luciferase® Reporter Assay to measure SMYD3 activity in cells transfected with a SMYD3 reporter, and the pGL4-hRluc/TK plasmid for normalization of the experimental reporter activity. GoTaq® DNA polymerase was used in semi-quantitative RT-PCR. (4189)

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Veterinary Microbiology 160(3-4), 463–467. Molecular detection of murine noroviruses in laboratory and wild mice. 2012

Farkas, T., Fey, B., Keller, G., Martella, V. and Egyed, L.

Notes: Mice RNA samples were converted to cDNA using an oligo-dT primer with the Reverse Transcription System, ethanol precipitated, vacuum dried and transferred to another lab. There they were reconstituted in 20μl of molecular biology grade water.

Detection of caliciviruses in the wild mice samples was attempted using generic calicivirus primers targeting sequences encoding conserved amino acid motifs in the RNA-dependent RNA polymerase (RdRp) region of ORF1. Two microliters of cDNA was used in 25μl PCR reactions using the GoTaq® Green Master Mix. Laboratory mouse RNA samples were tested only with MNV-specific primers in the AccessQuick™ RT-PCR System using 2μl RNA as template.

PCR products were cloned into pGEM-T® Vector and sequenced using M13 forward and reverse primers on an ABI PRISM® 3730 DNA Analyzer. (4330)

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J. Biol. Chem. 286, 37196–206. 5-Aza-2'-deoxycytidine activates iron uptake and heme biosynthesis by increasing c-myc nuclear localization and binding to the e-boxes of transferrin receptor 1 (TfR1) and ferrochelatase (Fech) genes. 2011

Ning, B., Liu., G., Liu, Y., Su, X., Anderson, G.J., Zheng, X., Chang, Y., Guo, M., Liu, Y., Zhao, Y. and Nie, G.

Notes: The authors used GoTaq® DNA Polymerase to amplify cDNA generated from total RNA (RT-PCR) extracted from murine erythroid leukemia (MEL) cells and mouse erythroid burst-forming units (BFU-Es). These cells were used to study the molecular mechanism of 5-aza-2'-deoxycytidine (5-aza-CdR)-induced erythroid differentiation, a process involved in azanucleotides for treating myelodysplastic syndromes (MDS) that reduces the risk of transformation to acute myeloid leukemia (AML). Treatment of these cells with 5-aza-CdR, a hypomethylation reagent, upregulated genes responsible for heme production and iron uptake. The pGL3 basic vector and promoter were used to create plasmid constructs of different E-box regulatory sequences with a luciferase reporter. The plasmids were cotransfected with c-Myc, Max or both transcription factors into human hepatocytes (HepG2). The Dual-Luciferase® Reporter Assay System was used to identify that the –6kb E-box of the transferrin receptor 1 (TfR1) promoter was a strong enhancer for inducing TfR1 expression when c-Myc and Max formed functional complexes that bound to it. Bisulfite sequencing was performed to study methylation patterns after 5-aza-2’-CdR treatment using the pGEM-T® Easy Vector system to ligate the isolated DNA fragments for TfR1 and Fech (ferrochetalase), which were transformed into E coli. for final sequencing. (4176)

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Arch. Med. Sci. 7, 501-507. Frequency of Firmicutes and Bacteroidetes in gut microbiota in obese and normal weight Egyptian children and adults. 2011

Ismail, N.A., Ragab, S.H., Elbaky, A.A, Shoeib, A.R., Alhosary, Y., and Fekry, D.

Notes: These authors investigated the differences in gut microbial flora between obese and normal-weight subjects. They used the Wizard® Genomic DNA Purification Kit to extract DNA from diluted fecal extracts. The extracted DNA was analyzed by PCR to identify Bacteroidetes and Firmicutes. Differences in distribution of these phyla was between the subject groups were identified. (4220)

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Appl. Environ. Microbiol. 77, 2113–21. General suppression of Escherichia coli O157:H7 in sand-based dairy livestock bedding. 2011

Westphal, A., Williams, M.L., Baysal-Gurel, F., LeJeune, J.T. and McSpadden Gardener, B.B.

Notes: The authors investigated the suppression of E. coli O157:H7 in sand-based livestock bedding and hypothesized that suppression of E. coli O157:H7 growth was mediated by an environmentally stable population of pathogen-suppressing bacteria. These bacteria were identified by terminal restriction fragment length polymorphism (T-RFLP) analysis of amplified 16S rRNA gene sequences isolated from used bedding followed by cloning and sequencing of the most abundant terminal restriction fragments. Amplifications were performed using the GoTaq® Flexi DNA Polymerase, then PCR products were cloned into the pGEM®-T Easy Vector. The PureYield™ Plasmid Miniprep System was used to purify plasmids for sequencing. (4165)

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Proc. Natl. Acad. Sci. USA 108, 17159–64. Identification of the bacterial protein FtsX as a unique target of chemokine-mediated antimicrobial activity against Bacillus anthracis. 2011

Crawford, M.A., Lowe, D.E., Fisher, D.J., Stibitz, S., Plaut, R.D., Beaber, J.W., Zemansky, J., Mehrad, B., Glomski, I.J., Strieter, R.M. and Hughes, M.A.

Notes: The authors identified three genetic loci involved in chemokine-mediated antimicrobial effects against Bacillus anthracis using a transposon mutant library in which a transposon is randomly inserted into the B. anthracis genome, then treating the mutant cells with chemokine to select for resistant cells. To identify the transposon insertion site, and thus the resistance-conferring loci, the authors amplified regions flanking the transposon by PCR using the GoTaq® Green Master Mix. (4167)

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J. Exp. Bot. 61, 395–404. CELL WALL INVERTASE 4 is required for nectar production in Arabidopsis. 2010

Ruhlmann, J.M., Kram, B.W. and Carter C.J.

Notes: The authors used microarray analysis to identify genes that are differentially expressed in nectaries of Arabidopsis and may be involved in nectar synthesis and secretion. One of these genes was cell wall invertase 4 (cwinv4). The authors generated two Arabidopsis cwinv4 mutant lines to study gene function and used GoTaq® Green Master Mix to confirm the mutant genotype. Expression patterns of cwinv4 in wildtype Arabidopsis and an ortholog from Brassica rapa were examined in various tissues by RT-PCR. The reverse transcription step was performed using the Reverse Transcription System and 0.1µg of RNA. (4093)

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Genetics 184, 119–28. Detection, validation, and downstream analysis of allelic variation in gene expression. 2010

Ciobanu, D.C., Lu, L., Mozhui, K., Wang, X., Jagalur, M., Morris, J.A., Taylor, W.L., Dietz, K., Simon, P. and Williams, R.W.

Notes: Sequence variation within a gene, such as single nucleotide polymorphisms (SNPs), can lead to differences in expressions levels of corresponding mRNAs; genes that are self-regulated by this mechanism (cis modulation) are difficult to identify accurately with existing techniques. The authors used bioinformatic and molecular approaches to estimate error rates when identifying cis-modulated transcripts and developed a simple method to detect these transcripts in C57BL/6J F1 hybrid mice. This method, which they named allelic specific expression, is RT-PCR-based and uses PCR primers that flank an informative SNP to quantify the differential expression levels of transcripts. GoTaq® Flexi DNA Polymerase was used in the PCR. (4051)

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Appl. Environ. Microbiol. 76, 829–42. Lysogeny and sporulation in Bacillus isolates from the Gulf of Mexico. 2010

Mobberley, J., Authement, R.N., Segall, A.M., Edwards, R.A., Slepecky, R.A. and Paul, J.H.

Notes: Certain bacteriophages can promote host cell sporulation under unfavorable conditions to increase survival of the host and prophage. These types of phages, known as spore-converting phages, have been found in terrestrial Bacillus species. In this article the authors examined the effect of prophages on sporulation of 11 Bacillus isolates from the Gulf of Mexico. Potential prophages in the Bacillus isolates were detected by PCR using unique PCR primer sets for each prophage genome and GoTaq® Green Master Mix. One of these isolates, B14905, was examined in more detail; the genome of this isolate was isolated using the Wizard® Genomic DNA Purification Kit, then sequenced. (4091)

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Vet. Pathol. 47, 163–6. Peliosis hepatis in cats is not associated with Bartonella henselae infections. 2010

Buchmann, A.U., Kempf, V.A., Kershaw, O. and Gruber, A.D.

Notes: The vasculoproliferative disorder peliosis hepatis has been linked to Bartonella henselae infection in humans and dogs. The authors sought to determine if this is true in cats, the natural reservoir for B. henselae, using immunohistochemistry (IHC) and PCR. Tissue sections from 26 cats with peliosis hepatis were formalin-fixed and paraffin-embedded and subjected to IHC using a B. henselae-specific antibody. To detect B. henselae DNA, PCR was performed using GoTaq® Flexi DNA Polymerase, genus-specific primers for the pap31 gene of Bartonella, 1mM MgCl2 and total DNA isolated from 8µm paraffin-embedded tissue sections. The presence of Bartonella DNA was confirmed by PCR using species-specific primers that target the B. henselae heat-shock protein (htrA). These studies found no link between B. henselae infection and peliosis heptis in cats. (4094)

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J. Exp. Bot. 61, 191–202. Physiological and molecular changes in Oryza meridionalis Ng., a heat-tolerant species of wild rice. 2010

Scafaro, A.P., Haynes, P.A. and Atwell, B.J.

Notes: The authors compared seedling growth rates, photosynthesis rates and expression levels of heat-responsive genes in the heat-resistant wild rice Oryza meridionalis and the domesticated rice O. sativa when grown at optimal and elevated temperatures. Proteins that were up- or downregulated in response to heat were identified by two-dimensional gel electrophoresis coupled with nano liquid chromatography on line with tandem mass spectrometry (nanoLC-MS/MS). Trypsin was used to cleave proteins prior to nanoLC-MS/MS. Semi-quantitative RT-PCR was performed using the GoTaq® Green Master Mix to determine if the heat-responsive proteins were transcriptionally regulated. (4092)

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Appl. Environ. Microbiol. 76, 2783–90. Revelation by single-nucleotide polymorphism genotyping that mutations leading to a premature stop codon in inlA are common among Listeria monocytogenes isolates from ready-to-eat foods but not human listeriosis cases. 2010

Van Stelten, A., Simpson, J.M., Ward, T.J. and Nightingale, K.K.

Notes: Listeria monocytogenes uses the internalin A protein (InlA) to cross the intestinal barrier and cause foodborne illness. Mutations in inlA can introduce a premature stop codon, producing a truncated InlA protein that is secreted rather than associated with the bacterial cell wall. Strains with these inlA mutations have reduced virulence. The authors describe an inlA single nucleotide polymorphism (SNP)-based genotyping assay to distinguish isolates with the inlA mutations and use this assay to screen >1,000 L. monocytogenes isolates from ready-to-eat foods and human listeriosis cases. The assay involves amplification of the full-length inlA gene using GoTaq® Colorless Master Mix, purification of amplified products, then single-base-pair extension reactions. (4099)

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Cereb. Cortex 20, 2333–47. Serotonin 3A receptor subtype as an early and protracted marker of cortical interneuron subpopulations. 2010

Vucurovic, K., Gallopin, T., Ferezou, I., Rancillac, A., Chameau, P., van Hooft, J.A., Geoffroy, H., Monyer, H., Rossier, J. and Vitalis, T.

Notes: The authors characterized mouse neocortical interneurons that express 5-HT3A, a ligand-gated cation channel activated by 5-hydroxytryptamine (serotonin), during embryonic development. Transgenic mice that expressed green fluorescent protein (GFP) under the control of the 5-HT3A promoter were created. Single 5-HT3A-expressing neurons within 300µm brain sections of transgenic mice at various stages of embryonic development were subjected to whole-cell path-clamp recordings to examine their electrophysiological properties. To confirm activation of the 5-HT3A promoter in these cells, GFP expression was visualized by fluorescence microscopy without breaking the patch clamp seal. The contents of these single neurons then were aspirated and expelled into a 10µl reverse transcription reaction. After the reverse transcription, PCR was performed to simultaneously detect mRNAs encoding two isoforms of glutamic acid decarboxylase, three calcium-binding proteins, three neuropeptides, two transcription factors and reelin, a protein thought to be involved in neuronal migration and morphology. Two rounds of PCR using nested primers were required to detect these mRNAs. PCRs were performed using GoTaq® DNA Polymerase. Amplified products were visualized by agarose gel electrophoresis, using the 100bp DNA Ladder as a size standard. (4096)

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Nucl. Acids Res. 38, 660–71. Analysis of acyclic nucleoside modifications in siRNAs finds sensitivity at position 1 that is restored by 5'-terminal phosphorylation both in vitro and in vivo. 2009

Kenski, D.M., Cooper, A.J., Li, J.J., Willingham, A.T., Haringsma, H.J., Young, T.A., Kuklin, N.A., Jones, J.J., Cancilla, M.T., McMasters, D.R., Mathur, M., Sachs, A.B. and Flanagan, W.M.

Notes: The authors studied the effect of nucleoside modifications in short interfering RNA (siRNA) on 5´ phosphorylation by Clp1 kinase, binding to the Argonaute protein Ago2 and Ago2-mediated cleavage. Mice were injected with 6mg/kg of a siRNA targeting apolipoprotein B (apoB), and total RNA was isolated from the livers after 24 hours. 5´ rapid amplification of cDNA ends (5´ RACE) was used to monitor mRNA cleavage and degradation, as cleaved target RNA yields a 150bp amplification product and uncleaved RNA does not yield an amplification product under the amplification conditions. The amplification steps of the 5´ RACE protocol were performed using GoTaq® Colorless Master Mix and gene-specific primers. (4097)

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Clin. Chem. 55, 748–56. Coamplification at lower denaturation temperature-PCR increases mutation-detection selectivity of TaqMan-based real-time PCR. 2009

Li, J., Wang, L., Jänne, P.A. and Makrigiorgos, GM.

Notes: The authors describe a new form of PCR, co-amplification at lower denaturation temperature PCR (COLD-PCR), to detect low-level somatic mutations. This technique is based on the facts that a) each DNA sequence has a critical denaturation temperature (Tc), which is lower than the melting temperature (Tm) and below which PCR efficiency decreases dramatically and b) Tc depends on DNA sequence. The authors used GoTaq® Flexi DNA Polymerase and mutation-specific TaqMan® probes for tumor protein 53 (TP53) and epidermal growth factor receptor (EGFR) to detect low-level somatic mutations in a mixture of wildtype and mutant DNAs. Conventional TaqMan® technology can detect mutant alleles at an abundance of 10–20% of that of the wildtype allele; using COLD-PCR the authors were able to increase selectivity 15- to 30-fold, detecting as little as 0.8% mutuant alleles. (4038)

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Appl. Environ. Microbiol. 75, 5600–6. Single nucleotide polymorphism-based diagnostic system for crop-associated Sclerotinia species. 2009

Andrew, M. and Kohn, L.M.

Notes: The authors developed a single nucleotide polymorphism (SNP)-based assay to distinguish four Sclerotinia species. The assay consisted of amplification of a 300bp intergenic spacer and portions of the calmodulin and ras genes, followed by Southern blot using species-specific, radiolabeled probes. Amplifications were performed using the GoTaq® Colorless Master Mix, 0.2µM of each primer and 10–20ng of template DNA. (4098)

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Clin. Can. Res. 15, 7562–70. Smoking-related gene expression in laser capture-microdissected human lung. 2009

Tan, X.L., Wang, T., Xiong, S., Kumar, S.V., Han, W. and Spivack, S.D.

Notes: The authors characterized differential expression of several carcinogen metabolism genes in human alveolar compartment (AC) and bronchial epithelial compartment (BEC) lung tissues in smokers, former smokers and people who have never smoked. They combined laser capture microdissection (LCM) and quantitative RT-PCR. RNA was isolated from paired microdissected malignant and nonmalignant lung tissue, 100ng of total RNA was reverse transcribed in a 20µl reaction, then 1µl of cDNA was amplified by real-time PCR using an ABI PRISM® 7500HT sequence detection system, GoTaq® Flexi DNA Polymerase and gene-specific primers. The expression level for each gene was normalized using glyceraldehyde-3-phosphate dehydrogenase (GAPDH). The results showed that expression of cytochrome P450 1B1 and glutathione-S-transferase P1 in AC, but not BEC, tissue was strongly associated with exposure to tobacco. (4095)

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Biol. Reprod. 79, 594–7. Can bovine in vitro-matured oocytes selectively process X- or Y-sorted sperm differentially? 2008

Bermejo-Alvarez, P., Rizos, D., Rath, D., Lonergan, P. and Gutiérrez-Adán, A.

Notes: To determine whether oocytes are able to select X-bearing or Y-bearing spermatozoa, the authors performed in vitro fertilization of bovine oocytes with X-sorted semen, Y-sorted semen, a mixture of X- and Y-sorted semen, and unsorted semen. The gender of the resulting embryos was determined by amplifying two DNA targets: a Y chromosome-specific target for gender assignment and a bovine-specific satellite sequence as a control. PCRs were performed using GoTaq® Flexi DNA Polymerase (1 unit per 25µl reaction), and amplified products were analyzed by agarose gel electrophoresis followed by ethidium bromide staining. (3881)

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Plant Physiol. 146, 1469–81. Deregulation of maize C4 photosynthetic development in a mesophyll cell-defective mutant. 2008

Covshoff, S., Majeran, W., Liu, P., Kolkman, J.M., van Wijk, K.J. and Brutnell, T.P.

Notes: The authors identified the maize homolog of hcf136 (Zmhcf136), a gene involved in photosynthesis, and used an RNA blot to determine if ZmHcf136 transcripts accumulate preferentially in mesophyll cells. DNA probes for Zmhcf136 and several cell-specific markers were generated by PCR using GoTaq® Green Master Mix, gel purified and radiolabeled prior to use in the RNA blots. To examine differences in protein accumulation and localization in wildtype and hcf136 mutants, proteins from subcellular fractions were subjected to two-dimensional gel electrophoresis, and spots of interest were excised, digested with Sequencing Grade Modified Trypsin, then analyzed by electrospray ionization-tandem mass spectrometry. (3883)

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J. Clin. Oncol. 26, 5783-8. Feasibility of screening for Lynch Syndrome among patients with colorectal cancer. 2008

Hampel H, Frankel WL, Martin E, Arnold M, Khanduja K, Kuebler P, Clendenning M, Sotamaa K, Prior T, Westman JA, Panescu J, Fix D, Lockman J, LaJeunesse J, Comeras I, de la Chapelle A.

Notes: Lynch syndrome (LS) is due to mutations in at least four DNA mismatch repair (MMR) genes. There are two tumor characteristics that can be screened for in an attempt to identify patients with CRC who are most likely to have LS. These characteristics are microsatellite instability (MSI) and loss of one or two of the MMR proteins in the tumor compared to normal tissue. MSI testing and IHC for the four mismatch repair proteins was performed on 500 tumors from unselected patients with CRC. If either MSI or IHC was abnormal, complete mutation analysis for the mismatch repair genes was performed. GoTaq Master Mix (Cat.# M7122, Cat.# M7132) (4111)

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J. Cell Sci. 121, 504–13. Integrin alpha9 beta1 is a receptor for nerve growth factor and other neurotrophins. 2008

Staniszewska, I., Sariyer, I.K., Lecht, S., Brown, M.C., Walsh, E.M., Tuszynski, G.P., Safak, M., Lazarovici, P. and Marcinkiewicz, C.

Notes: The authors investigated the ability of α9β1 integrin to act as a neurotrophin receptor and affect cell signaling pathways. As part of the study, RT-PCR was used to detect the presence of other neurotrophin receptors in their model cell line, SW480. Reverse transcription was performed using the Reverse Transcription System and 1µg of total RNA isolated using the SV Total RNA Isolation System. The resulting cDNA (5µg) was amplified for 35 cycles (β-actin as a control) or 40 cycles (TrkA and p75NTR) using GoTaq® Green Master Mix. RT-PCR results were confirmed by Western blot analysis. (3884)

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J. Clin. Microbiol. 46, 652–64. Multilocus sequence typing reveals that the population structure of Candida dubliniensis is significantly less divergent than that of Candida albicans. 2008

McManus, B.A., Coleman, D.C., Moran, G., Pinjon, E., Diogo, D., Bougnoux, M.E., Borecká-Melkusova, S., Bujdákova, H., Murphy, P., d'Enfert, C. and Sullivan, D.J.

Notes: To determine the usefulness of multilocus sequence typing (MLST) in differentiating Candida species during epidemiological studies, the authors investigated the population structure of C. dubliniensis by amplifying the same 10 MLST loci found to be useful in differentiating isolates of C. albicans, a closely related species. PCRs were performed using 1.25 units of GoTaq® Flexi DNA Polymerase and 1ng of DNA template in a 50µl reaction. (3880)

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