, Volume 34, Issue 2, pp 199-206

An improved technique for selective silver staining of nucleolar organizer regions in human chromosomes

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


A reliable technique for staining human chromosomal nucleolar organizers (NOR's) with silver solutions is described. The NOR's can be selectively stained dark brown by silver solutions leaving the chromosome arms unstained and available for counterstaining with orcein or Giemsa dyes. Unequivocal identification of chromosome pairs bearing NOR's can be achieved using fluorescent banding techniques followed by silver staining. The silver staining procedure for NOR's was simplified and standardized through control of the chemical and physical conditions during silver impregnation and developing.