Each codon either codes for an amino acid or tells the cell to stop making a protein chain.
每一个密码子或者编码一种氨基酸,或者告诉这些细胞停止生产这个蛋白质链。
2
The underlined nucleotides are the first upstream in-frame stopcodon and the two putative polyadenylation signals, respectively. The asterisk indicates the stopcodon.