Notes: In the process of demonstrating the role of IN in HIV-1 integration in yeast, the authors purified all DNA vectors and PCR products with the Wizard® Plus SV Miniprep System and Wizard® SV Gel System. PCR products were generated using Taq DNA Polymerase. The pGEM®-T Vector was used to clone amplification products. Sequencing was performed using BamHI, religated with T4 DNA Ligase. (3704)

Notes: The authors selected repetitive elements in the human genome using a novel technique: GREM. T4 DNA Ligase was used to ligate adapters to digested genomic DNA prior to PCR, and exonuclease III was used to generate the necessary 5´ termini. After the final amplification, the PCR products were cloned into the pGEM^®-T Vector, then sequenced. (3550)

Notes: To purify stolbur phytoplasma DNA from total DNA of infected periwinkle plants, two rounds of suppression subtractive hybridization (SSH) were performed, followed by amplification with Taq DNA polymerase. The resultant PCR products (1µl) were ligated into 50ng of pGEM^®-T Easy Vector using 3 units T4 DNA Ligase. After transformation of DH10B cells, ampicillin-resistant colonies were grown and the plasmids purified using the Wizard^® Plus SV Minipreps DNA Purification System. The insert lengths were estimated after EcoR I digestion and agarose gel electrophoresis prior to amplification and labeling with digoxigenin. These probes were used for dot hybridization with denatured healthy or infected plant DNA (10µg) and the corresponding plasmid as a positive control (100 ng). (3436)

Notes: The LigaFast™ Rapid DNA Ligation System was used in the subcloning of an insert from a mammalian expression vector into a retroviral vector and also into a cellular reporter vector.  (2610)

Notes: The authors investigated expression of BRCA1 from alternative transcripts possessing different 5′ UTRs. RT-PCR using Promega's AMV reverse transcriptase was performed to generate cDNAs from total RNA isolated from human tissue. Promega's Taq DNA Polymerase was used for the PCR reaction. The authors also prepared two mRNAs that contained one or the other of the 2 alternative 5′ UTRs (ex1a or ex1b) fused with the luciferase coding region. To generate the corresponding DNA for these constructs, the luciferase coding region was amplified from Promega's pGEM® Vector and ligated to PCR-amplified ex1a or exlb. These ligation products served as the template amplifying two cDNA constructs (exla-luc or ex1b-luc). Ten additional cDNAs were made containing a variety of changes to the 5′UTR region of BRCA1. In vitro translation experiments were performed to determine how the composition of the 5′UTR affected protein expression levels (using Promega's RNasin to protect transcribed mRNA; T7 polymerase buffer; and rabbit reticulocyte and wheat germ extracts for translation). The authors conclude that secondary structures associated with elements in the longer 5′UTR reduced translation rates and could be responsible for the reduced expression of BRCA1 often associated with spontaneous ovarian and breast cancers. (2441)

Notes: In an enhancer-trap experiment, the Anti β-Galactosidase mAb was used for immunostaining to identify mutants that carry insertions of a β-Galactosidase reporter gene near an enhancer element that enhances the expression in the ring gland of Drosophila. T4 DNA ligase, Taq DNA Polymerase and Proteinase K were also used in the studies. (1067)