最近发明一种称为差异表达的ｍＲＮＡ呈现技术，鉴别不同细胞群体间的基因表达质和量之差异。以其ｍＲＮＡ为模板进行ＰＣＲ扩增所得到的ｍＲＮＡ３′末端片段可以快速进行序列分析，又可作为探针进行Ｎｏｒｔｈｅｒｎ或Ｓｏｕｔｈｅｒｎ杂交，用以确定和分离这些差异表达的基因种类。 Recently, a technique for mRNA expression called differential expression was invented to identify differences in the quality and amount of gene expression between different cell populations. The 3 ’terminal fragment of mRNA obtained by PCR amplification using its mRNA as a template can be rapidly sequenced and can also be used as a probe for Northern or Southern hybridization to identify and isolate these differentially expressed gene types.