A new test of exocrine pancreatic function using N-benzoyl-L-tyrosyl-p-aminobenzoic acid: Part II. The correlation of PFD and chymotrypsin output during PS-test

N-benzoyl-L-tyrosyl-p-aminobenzoic acid (BTPABA), a new synthetic peptide is specifically hydrolyzed by chymotrypsin to yield p-aminobenzoic acid (PABA), which is estimated colorimetrically by diazotizing. The method suitable for assay of chymotrypsin in duodenal aspirates was investigated using BTPABA as a substrate. Then the chymotrypsin output during PS-test was estimated in the patients with pancreatic disorder. The chymotrypsin output significantly correlated to the trypsin output (P