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人类核仁组织者区(Nucleolar orga-nize regions)即(NORs),位于人类染色体D组第13—15及G组第21—22对短臂次缢痕或随体柄区,该区可被硝酸银所染色简称Ag-NORs。该位点是18s和28s核糖体基因(rDAN)所在部位。在间期细胞核仁中
Nucleolar orga-nize regions (NORs), located on chromosomes 13-15 of group D and pairs 21-22 of group G on the short arm or stalk region, can be Silver nitrate staining referred to as Ag-NORs. This locus is where the 18s and 28s ribosomal genes (rDANs) are located. In the interphase cell nucleolus