Chemical reactions which affect the biological activity of human gonadotrophins

Abstract
The effects of various reagents on the activity of human urinary and pituitary gonadotrophins has been studied by 2 assay methods, the first measuring the combined effects of follicle-stimulating hormone and interstitial-cell-stimulating hormone and the second being more specific for follicle-stimulating hormone. The only reagent to affect one type of activity more than the other was sodium borohydride. This appeared to destroy interstitial-cell-stimulating hormone more readily than follicle-stimulating hormone. Methods are described for the combination of urinary gonadotrophin with Zn, Cu and triazine dyes without loss of biological activity.