Reaction catalyzed by D-proline dehydrogenase (1.5.99.13)

		+			=			+
	D-proline	+		oxidized 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide	=		DELTA1-pyrroline 2-carboxylate	+		reduced 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide