. "Belongs to peptidase family M3." . "Natural substrates are precursor proteins that have already been processed by mitochondrial processing peptidase." . . . "Mitochondrial intermediate peptidase" . "Release of an N-terminal octapeptide as second stage of processing of some proteins imported into the mitochondrion." . "Zinc" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .