7-hydroxymethyl chlorophyll a reductase / chlorophyll cycle / 7-hydroxymethyl chlorophyll a reductase activity / chlorophyll metabolic process / oxidoreductase activity, acting on CH or CH2 groups, with an iron-sulfur protein as acceptor / iron-sulfur cluster binding / chloroplast / extracellular region / metal ion binding 類似検索 - 分子機能