control procedures , viz. , competitive inhibition of gia labeling using an excess of unlabeled insulin in the incubation medium , preincubation of the gia reagent with an antibody directed toward porcine insulin , and the incorporation of 125i-insulin into the gia reagent , indicated the specificity and selectivity of the gia histochemical procedure for the localization of insulin binding sites .
C0724601
porcine
C0021641
insulin