Moreover, by dideoxy sequencing of DNA fragment derived from PCR, it was found that there was an exon 5 deletion transcript of TF in APL cell as well, its biological significance remained unknown.

• 此外，通过对PCR产物进行测序，发现APL细胞中还存在TF第五个外显子缺失的转录本，其生物学意义尚不明了。