5 ' race analysis indicated that ha 122 transcripts start predominantly in the consensus major late transcription initiation motif rtaag around 47nt upstream of the putative translation start codon with a minor start at position - 89 5 ’ race ( rapidamplificationofcdnaend )分析结果表明ha122基因的转录主要从翻译起始密码子上游第47个碱基起始，该处有一个晚期转录信号taag 。
