• Kyungpook Mathematical Journal
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• 제53권3호
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• pp.385-395
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• 2013

To analyze the enzyme reaction on DNA knots and links, we study tangle embedding and the number of reaction. By using the quantum SU(3) invariant of knots and links we get a necessary condition for a tangle to be embedded in a knot or link. Moreover we give a relationship between the number of reactions and the changes of the value of quantum SU(3) invariant for the corresponding knots and links in a processive recombination.

• 대한수학회지
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• 제51권4호
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• pp.817-836
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• 2014

We develop a topological model of site-specific recombination that applies to substrates which are the connected sum of two torus links of the form T(2, n)#T(2, m). Then we use our model to prove that all knots and links that can be produced by site-specific recombination on such substrates are contained in one of two families, which we illustrate.

• Journal of applied mathematics & informatics
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• 제35권3_4호
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• pp.349-369
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• 2017

In last 30 years, mathematical tangle theory is applied to molecular biology, especially to DNA topology. The recent issues and research results of this topic are reviewed in this paper. We introduce a tangle which models an enzyme-DNA complex. The studies of 2-string tangle equations related to Topoisomerase II action and site-specific recombination is discussed. And 3-string tangle analysis of Mu-DNA complex, n-string tangle analysis ($n{\geq}4$) of DNA-enzyme synaptic complexes are also discussed.

• 한국응용곤충학회지
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• 제46권1호
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• pp.169-173
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• 2007

경북 안동에서 재배하는 둥근마(Dioscorea bulbifera)에서 뿌리혹선충 피해가 발견되었다. 피해 괴경에서 다수의 암컷 선충을 분리하였고, 이들의 cytochrome oxidase subunit II (COII) DNA 서열을 분석하였다. 둥근마의 뿌리혹 형성을 유도하는 식물 선충의 COII 유전자위 크기와 염기서열은 Meloidogyne javanica 또는 M. incognita의 해당 영역과 높은 유사도를 보였다. 그러나 이들 두 종을 구분하는데 이용되는 제한효소(HinfI)위치에 있어서 본 둥근마로부터 분리된 뿌리혹선충은 이들 두 종과 뚜렷한 차이를 보였다.