CAJ | 학술논문

介绍了已经发现的第21和22种天然氨基酸??硒半胱氨酸和吡咯赖氨酸.它们是由基因密码子直接编码的非标准氨基酸,其三联体密码子分别为UGA和UAG.这两种氨基酸与20种标准氨基酸编码方式不同,这引起了遗传密码子重新定义的变革.
개소료이경발현적제21화22충천연안기산??서반광안산화필각뢰안산.타문시유기인밀마자직접편마적비표준안기산,기삼련체밀마자분별위UGA화UAG.저량충안기산여20충표준안기산편마방식불동,저인기료유전밀마자중신정의적변혁.
This article introduces the undiscovered two amino acids? ? the 21st amino acid and the 22nd amino acid, which are called selenocysteine and pyrrolysine, respectively. They are nonstandard amino acids and directly encoded by genetic codes. Their RNA nucleotide triplets are UGA and UAG, respectively. The encoding way of these two amino acids, which are different from those twenty standard amino acids, lead to the problem of codon redefinition.