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定义了分子序列（碱基序列和对应的氨基酸序列）的突变危险性函数；通过危险性函数的极小化可以导出遗传密码的简并规则，终止密码子在密码表上的位置及亲－疏水畴排布，氨基酸在密码表上的定位接近标准密码表．各个生物类别的突变危险性函数值差别不超过５％ ，可看作守恒量．Ｒａｓ 家族癌基因产物具有较大的突变危险性函数值，这提示分子序列的突变危险性函数可能有重要的应用价值和理论意义．
Defines the mutation risk function of molecular sequence (base sequence and corresponding amino acid sequence); deduces the degeneracy rule of genetic code, the position of stop codon in the password table and the affinity-hydrophobicity by the minimization of risk function Domain arrangement, the amino acid in the password table on the location close to the standard password table. Mutation risk function values of various biological categories does not differ by more than 5%, can be regarded as conserved quantity. Ras family oncogene products have a greater risk of mutation function values, suggesting that the mutation risk function of molecular sequences may have important application value and theoretical significance.