go_id,ontology,go_term,term_definition,evidence GO:0004190,MF,"aspartic-type endopeptidase activity","Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a mechanism in which a water molecule bound by the side chains of aspartic residues at the active center acts as a nucleophile.",IEA GO:0006508,BP,proteolysis,"The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.",IEA