In all existing life forms, the four "letters" of the genetic code, called nucleotides, are read in triplets, so that every three nucleotides encode a single aminoacid.
The code is read, three bases at a time, by a series of transfer RNA (tRNA) molecules, which recognize the mRNA message and align the appropriate aminoacid in place.
一系列转移RNA分子将每三个碱基读成一个密码子,识别出mRNA的信息并将氨基酸相应排列起来。
3
Having more than one codon specify the same aminoacid. used of a genetic code.