codon bias 中文意思是什麼
codon bias
解釋
密碼偏愛,密碼子偏倚-
Method for the design of mrna detecting genechip based on codon usage bias
一種基於密碼子使用偏性的檢測型基因晶元設計方法 -
The partial sequences of the mitochondrial co i, co ii and trna gene of the adults and larvae of 4 species from lepidostomatidae and the adults and larvae of apsilochorema unculatum and a. hwangi were sequenced and compared in this study. in the sequences obtained ( 1718 ~ 2239bp ), a % + t % was about 69. 2 %, 267 nucleotide sites were substituted in apsilochorema and 266 nucleotide sites were substituted in lepidostomatidae. at bias in the third codon position site was much higher than the other two sites, reaching about 81. 9 %
{的比對分析表明:在coi區的一45一個比對位點中，有1260個保守位點， 191個變異位點，其中98個轉換位點， 93個顛換位點;發生在密碼子第三、第一和第二位點的變異分別為78 % 、 18 %和4 % ;種內序列歧異度為o一0 . 9 % ，而種間為一4 %一24 % 。 -
As a typical protein - coding gene, the second positions were least variable, first positions were more variable, and third positions were the most variable. although codon usage is effected by a / t bias, the amino acid composition is not varied with this bias
密碼子以a 、 t結尾頻率高，第三位是g的密碼子使用較少，反映出cytb基因在密碼子的使用上具有偏向性，同果蠅和蜜蜂相一致。
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