The polymerase chain reaction (PCR) and dideoxy DNA sequencing are frequently used techniques of molecular biology which utilise DNA polymerases. The high temperatures required for PCR necessitate a thermostable enzyme for DNA amplification, and DNA polymerase derived from the thermophilic microorganism, Thermus aquaticus, is used most commonly. The high optimal polymerisation temperature of th...

DNA polymerases are present in all organisms and are important enzymes that synthesise DNA molecules. They are used in various fields of science, predominantly as essential components for in vitro DNA syntheses, known as PCR. Modern diagnostics, molecular biology and genetic engineering need DNA polymerases which demonstrate improved performance. This study was aimed at obtaining a new NeqSSB-T...

The DNA polymerase I from Thermus aquaticus (Taq polymerase) performs lagging-strand DNA synthesis and DNA repair. Taq polymerase contains a polymerase domain for synthesizing a new DNA strand and a 5'-nuclease domain for cleaving RNA primers or damaged DNA strands. The extended crystal structure of Taq polymerase poses a puzzle on how this enzyme coordinates its polymerase and the nuclease act...

Introduction: Oral cancer is one of the most common malignancies and has a significant association with tobacco chewing. Micro RNA 21 (mi-RNA 21) been identified as oncogenic RNA, implicated in etio-pathogenesis various neoplastic lesions. Objective: (i) To assess microRNA expression oral patients history chewing habits (ii) to carry out its clinicopathological correlation. Material Method: The...

DNA polymerases contain active sites that are structurally superimposable and conserved in amino acid sequence. To probe the biochemical and structure-function relationship of DNA polymerases, a large library (200,000 members) of mutant Thermus aquaticus DNA polymerase I (Taq pol I) was created containing random substitutions within a portion of the dNTP binding site (Motif A; amino acids 605-6...

The RFLP/PCR approach (restriction fragment length polymorphism/polymerase chain reaction) to genotypic mutation analysis described here measures mutations in restriction recognition sequences. Wild-type DNA is restricted before the resistant, mutated sequences are amplified by PCR and cloned. We tested the capacity of this experimental design to isolate a few copies of a mutated sequence of th...