Reaction catalyzed by thioredoxin:protein disulfide reductase (1.8.4.16)

	[CcmG protein] carrying a disulfide bond	+			=		[CcmG protein] with reduced L-cysteine residues	+
	[CcmG protein] carrying a disulfide bond	+		thioredoxin	=		[CcmG protein] with reduced L-cysteine residues	+		thioredoxin disulfide