ID   1.17.1.3
DE   Leucoanthocyanidin reductase.
AN   Leucocyanidin reductase.
CA   (2R,3S)-catechin + NADP(+) + H(2)O = 2,3-trans-3,4-cis-leucocyanidin +
CA   NADPH.
CC   -!- Catalyzes the synthesis of catechin, catechin-4-beta-ol
CC       (leucocyanidin) and the related flavan-3-ols afzelechin and
CC       gallocatechin, which are initiating monomers in the synthesis of
CC       plant polymeric proanthocyanidins or condensed tannins.
CC   -!- While 2,3-trans-3,4-cis-leucocyanidin is the preferred flavan-3,4-
CC       diol substrate, 2,3-trans-3,4-cis-leucodelphinidin and 2,3-trans-3,
CC       4-cis-leucopelargonidin can also act as substrates, but more slowly.
CC   -!- NADH can replace NADPH but is oxidized more slowly.
DR   Q84V83, LAR_DESUN  ;
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