Acidic proteinases from resting cotyledons of cowpea (Vigna unguiculata)

Copwpea (Vigna unguiculata) seed cotyledons contain acidic hemoglobinase activity that can be inhibited by the aspartic acid proteinase specific inhibitor pepstatin. Two of these proteinases were isolated by affinity and ion exchange chromatography. Their relative molecular weights were 69,000 and 45,000 as calculated by gel filtration chromatography