BCIP/NBT chromogen/substrate

Alkaline phosphatase, an enzyme derived from bovine intestinal mucosa, is often used as a label for in situ hybridization, immunohistochemistry, Southern and Northern hybridization and DNA sequencing. Detection of this enzyme requires the use of an insoluble colored substrate. GTX73326 is a new stable, BCIP/NBT solution in ready to use form. It produces a blue colored end product at the positive sites which gives a good contrast with red nuclear fast counter stain. Specimens stained in BCIP/NBT can not be dehydrated in ethanol and hence should be mounted in aqueous based mounting medium.