The Thermus aquaticus DNA polymerase I (Taq Pol I) gene was cloned into a plasmid expression vector that utilizes the strong bacteriophage PL promoter. A truncated form of Taq Pol I was also constructed. The two constructs made it possible to compare the full-length 832-amino-acid Taq Pol I and a deletion derivative encoding a 544-amino-acid translation product, the Stoffel fragment. Upon heat ...

The Thermus aquaticus DNA polymerase I (Taq Pol I) gene was cloned into a plasmid expression vector that utilizes the strong bacteriophage lambda PL promoter. A truncated form of Taq Pol I was also constructed. The two constructs made it possible to compare the full-length 832-amino-acid Taq Pol I and a deletion derivative encoding a 544-amino-acid translation product, the Stoffel fragment. Upo...

For the detection of RNA transcripts by RT-PCR, prior removal of genomic DNA must be performed. To remove genomic DNA, RNA is often prepared by DNase I digestion following phenol extraction. Recently, one-tube or onebuffer systems of RT-PCR were developed to prevent loss of RNA and to reduce the risk of contamination (2,6). In these methods, DNase I is added before RT. Taq DNA polymerase prepar...

2.Cusi, M.G., M. Valassina and P.E. Valensin. 1994. Comparison of M-MLV reverse transcriptase and Tth polymerase activity in RTPCR of samples with low virus burden. BioTechniques 17:1034-1036. 3.Fiorenza, M.T. and F. Mangia. 1998. Quantitative RT-PCR amplification of RNA in single mouse oocytes and preimplantation embryos. BioTechniques 24:618-623. 4.Huang, Z., M.J. Fasco and L.S. Kaminsky. 199...

The genetic diversity of a vesicular stomatitis virus population was analysed by RT-PCR, cloning and sequencing of two approximately 500 nucleotide regions of the virus genome. PCR amplifications were performed in parallel experiments with both Taq and Pfu DNA polymerases, and important differences were observed. Between 10 and 22 mutations were detected when virus populations were analysed by ...

taq dna polymerase is widely used in laboratories and for this reason many investigators have focused their attention on understanding the role of various regions and amino acids in this enzyme. o-helix is a part of taq polymerase suggested to play an important role in the enzyme fidelity. the influence of asn666 in this helix on the enzyme function has never been investigated, and therefore by...

We report a study of TGFA/ Taq I polymorphisms and environmental factors in non-syndromic oral cleft in Southern Brazil. Nonsyndromic cleft case-parent triads were recruited to participate. Clinical data was collected with an emphasis on tobacco and alcohol use during pregnancy. DNA was extracted from peripheral blood and TGFA/ Taq I polymorphisms were analyzed by PCR/RFLP with Taq I restrictio...

AIMS To investigate the associations between the Rsa I, Dra I, and Taq I genetic polymorphisms of cytochrome p4502E1 and susceptibility to alcoholic liver disease or to hepatocellular carcinoma. METHODS DNA samples isolated from 61 patients with alcoholic liver disease, 46 patients with hepatocellular carcinoma, and 375 healthy controls were subjected to polymerase chain reaction amplificatio...