the protease preparation had a 280/260 nm absorbance ratio of 1.8 , was free of detectable amounts of endotoxin , carbohydrate , phosphorus , and other known extracellular enzymes of s. marcescens , and was homogeneous by ouchterlony double immunodiffusion and grabar-williams immunoelectrophoresis .
C0030946
protease preparation
C0014442
enzymes