Henaut A
Biosci Rep. 1982 Jul;2(7):515-9. doi: 10.1007/BF01115250.
The study of silent substitutions in the mammalian mitochondrial genes shows that the probability that two species use the same codon is, as a general rule, equal to the product of the probabilities of use of this codon in the two species. The only appreciable exception is that of serine, for which the UCX and AGY codons are not interchangeable.
对哺乳动物线粒体基因中沉默替代的研究表明，一般来说，两个物种使用相同密码子的概率等于该密码子在这两个物种中使用概率的乘积。唯一明显的例外是丝氨酸，其UCX和AGY密码子不可互换。
