Reaction catalyzed by C-terminal processing peptidase (3.4.21.102)

	C-terminal 19 amino acids of preD1 protein	+		H2O	=		pre-peptide of D1	+		oligomer of 11 amino acids
	C-terminal 19 amino acids of preD1 protein	+		H2O	=		pre-peptide of D1	+		oligomer of 11 amino acids