RADIOIMMUNOASSAY OF PAPAIN IN BEER

Abstract
A radioimmunoassay (RIA) of papain is described which is capable of detecting 0·2 μg of papain/ml in beer, a level approximately 1% of that normally used for chillproofing. Changes in incubation conditions significantly accelerates the papain determination with only slight loss of accuracy. Apart from the high sensitivity it has been shown that the method is highly specific and distinguishes papain from the other chillproofing enzymes used.