ID 1.8.7.2 DE ferredoxin:thioredoxin reductase. CA [thioredoxin]-disulfide + 2 H(+) + 2 reduced [2Fe-2S]-[ferredoxin] = CA [thioredoxin]-dithiol + 2 oxidized [2Fe-2S]-[ferredoxin]. CC -!- The enzyme contains a [4Fe-4S] cluster and internal disulfide. CC -!- It forms a mixed disulfide with thioredoxin on one side, and docks CC ferredoxin on the other side, enabling two one-electron transfers. CC -!- The reduced thioredoxins generated by the enzyme activate the Calvin CC cycle enzymes EC 3.1.3.11, EC 3.1.3.37 and EC 2.7.1.19 as well as CC other chloroplast enzymes by disulfide reduction. DR P41348, FTRC1_SPIOL; P41349, FTRC2_SPIOL; Q9SJ89, FTRC_ARATH ; DR Q9TM25, FTRC_CYACA ; O78461, FTRC_GUITH ; P41347, FTRC_MAIZE ; DR Q1XDA1, FTRC_NEOYE ; Q6K471, FTRC_ORYSJ ; P51386, FTRC_PORPU ; DR O49856, FTRC_SOYBN ; Q55389, FTRC_SYNY3 ; //