the leukotoxins in the ultrafiltrates ( less than 500 mol wt ) were stable at 60 c for 4 hours and at 100 c for 30 minutes , stable to extremes of ph ( 3 to 11 ) , and stable to degradative enzymes including trypsin , protease , alpha-amylase , lipase , deoxyribonuclease , and ribonuclease .
C0014442
enzymes
C0030946
protease