嘌呤-嘧啶对称性、决定度与DNA
Purine-pyrimidine symmetry, determinative degree and DNA
摘要：
本文用引入的决定度这一与密码子使用有关的核苷酸的新特征来研究DNA序列中与嘌呤嘧啶含量有关的各种对称性。提出了CG压力的数字学解释。给出了DNA序列的分类。实序列计算表明，嘌呤-嘧啶对称性随着有序化程度的增加而增加。提出了一个新的表征DNA嘌呤-嘧啶对称性破缺的小参数。
英文摘要：
Various symmetries connected with purine-pyrimidine content of DNA sequences are studied in terms of the intruduced determinative degree, a new characteristics of nucleotide which is connected with codon usage. A numerological explanation of CG pressure is proposed. A classification of DNA sequences is given. Calculations with real sequences show that purine-pyrimidine symmetry increases with growing of organization. A new small parameter which characterizes the purine-pyrimidine symmetry breaking is proposed for the DNA theory.
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