Reaction catalyzed by D-lactate dehydrogenase (acceptor) (1.1.99.6)

		+			=			+
	(R)-lactate	+		oxidized 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium	=		pyruvate	+		reduced 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium