( b ) three acidic endopeptidases , with ph optima between 2.5 and 3.5 , showing molecular and functional properties almost identical with those of the three proteinases previously purified from solubilized erythrocyte membranes [ pontremoli et al . ( 1979 ) biochem . j . 181 , 559 -- 568 ] ;
C0030946
endopeptidases
C0030940
proteinases