2017
DOI: 10.20450/mjcce.2017.1147
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Purification and optimization of conditions for DNA polymerase isolated from thermophile bacteria Bacillus caldolyticus

Abstract: Тhermophilic bacteria Bacillus caldolyticus isolated from the hot spring in Bansko, Republic of Macedonia, were used for the isolation of DNA polymerase. Bacterial cells were disrupted by sonication and the first step in the purification of DNA polymerase was 40% ammonium sulfate precipitation. This was followed by chromatographic procedures on Sephadex G-50, DE-52 and CM-52 cellulose. DNA polymerase activity was analyzed at each step of purification using the incorporation of 3 H dATP in activated calf thymus… Show more

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“…After that, 300 ng of DNA were used in 50 µL PCR reactions to yield a 760 bp fragment. PCR reactions were performed as follows: PCR buffer (10 mM TRIS-HCl pH 8.3, 50 mM KCl); 20 pM of each primer; 2.5 mM dNTP; 200 µM MgCl 2 ; 5 U Taq polymerase (Popovski, 1999). PCR steps were: denaturation at 95 °C for 5 min, 3 steps of denaturation at 94 °C for 1 min, hybridization at 65 °C, 1 min and subsequent polymerisation at 72 °C during 2 min, with 35 cycles.…”
Section: Methodsmentioning
confidence: 99%
“…After that, 300 ng of DNA were used in 50 µL PCR reactions to yield a 760 bp fragment. PCR reactions were performed as follows: PCR buffer (10 mM TRIS-HCl pH 8.3, 50 mM KCl); 20 pM of each primer; 2.5 mM dNTP; 200 µM MgCl 2 ; 5 U Taq polymerase (Popovski, 1999). PCR steps were: denaturation at 95 °C for 5 min, 3 steps of denaturation at 94 °C for 1 min, hybridization at 65 °C, 1 min and subsequent polymerisation at 72 °C during 2 min, with 35 cycles.…”
Section: Methodsmentioning
confidence: 99%