ID 1.1.1.21 DE aldose reductase. AN aldehyde reductase. AN polyol dehydrogenase (NADP(+)). CA (1) an alditol + NAD(+) = an aldose + H(+) + NADH. CA (2) an alditol + NADP(+) = an aldose + H(+) + NADPH. CC -!- Wide specificity. CC -!- Formerly EC 1.1.1.139. DR P21300, ALD1_MOUSE ; Q5RJP0, ALD1_RAT ; O08782, ALD2_CRIGR ; DR P45377, ALD2_MOUSE ; P16116, ALDR_BOVIN ; Q8SSK6, ALDR_ENCCU ; DR P23901, ALDR_HORVU ; P15121, ALDR_HUMAN ; P45376, ALDR_MOUSE ; DR P80276, ALDR_PIG ; P15122, ALDR_RABIT ; P07943, ALDR_RAT ; DR Q6IMN8, ALRA_DICDI ; Q54NZ7, ALRB_DICDI ; Q55FL3, ALRC_DICDI ; DR P38715, GRE3_YEAST ; //