银染是对有活性的核仁组织者区(NORs)的细胞化学染色法,这种方法可以估价有转录活性的NORs的位置和数量。但人体恶性组织的NORs的数目、大小和形状经常出现不规则性,所以很多学者对癌细胞中核蛋白体顺反子的细胞学表型引起了兴趣。过去的一些报导说法不一,一些学者说:尽管肿瘤细胞系具有核仁组织者的染色体增加了,但是Ag—NORs的数目仍和对照 Silver staining is a cytochemical staining method for active NORs that can estimate the location and number of transcriptionally active NORs. However, the number, size, and shape of NORs in human malignant tissues are often irregular, so many scholars have become interested in the cytological phenotype of nucleoprotein cis-transposons in cancer cells. Some reports in the past have been mixed. Some scholars have said that although the number of chromosomes in tumor cell lines with nucleolar organizers has increased, the number of Ag-NORs is still comparable.