Reaction catalyzed by RCE1 (3.4.99.B1)

	geranylgeranyl-Rab1b-CaaX	+		H2O	=		geranylgeranyl-Rab1b-C	+		aaX
	geranylgeranyl-Rab1b-CaaX	+		H2O	=		geranylgeranyl-Rab1b-C	+		aaX