poly a造句

• The tk gene contained an open reading frame of 957 bp encoding a 318 aa protein . upstream of the tk orf , three putative gc boxes are located at positions - 22 , - 166 and - 199 . a potential poly a signal begins 110 nucleotides downstream from the termination codon at position 1306
  在tkorf上游- 22 、 - 166 、 - 199位存在3个gc框样序列，在终止密码子下游第110个核苷酸处的1306位存在有多聚腺苷加尾信号。
• Sequence analysis the cdna clone contains an 546bp orf ( open reading fragment ) encoding a predicted protein of 181 amino acids with molecular weight of 20 . 7kd , 130bp 5 ' non - coding region and 152bp 3 " non - coding region including polyadenylation signal sequence aattaa and poly a tail . 3
  棉花arf基因的序列分析核苷酸序列分析表明， gharf的全长为828bp ，其中含有一个从131bp到676bp间的546bp构成的一个完整开放阅读框，它编码181个氨基酸、分子量为20 . 7kd的蛋白质。