a base-specific ribonuclease ( rnase ) ru ( ec 3.1.27.5 ) was isolated and purified from rhizopus niveus in a yield of 17 % by the procedures of acetone precipitation , column chromatography on duolite a-2 , deae-cellulose , cm-cellulose , and 2 ' ( 3 ' ) -aminohexyl-5'-ump-agarose .
C0011050
deae-cellulose
C0007648
cellulose