ID 7.2.1.3 DE ascorbate ferrireductase (transmembrane). AN cytochrome b561. CA Fe(3+)(out) + L-ascorbate(in) = Fe(2+)(out) + H(+) + monodehydro-L- CA ascorbate radical(in). CC -!- A diheme cytochrome that transfers electrons across a single CC membrane, such as the outer membrane of the enterocyte, or the CC tonoplast membrane of the plant cell vacuole. CC -!- Acts on hexacyanoferrate(III) and other ferric chelates. CC -!- Formerly EC 1.16.5.1. DR Q8L856, ACFR1_ARATH; Q9SWS1, ACFR2_ARATH; Q67ZF6, ACFR3_ARATH; DR Q9C540, ACFR4_ARATH; Q8N8Q1, C56D1_HUMAN; A2AE42, C56D1_MOUSE; DR Q5E965, C56D2_BOVIN; O14569, C56D2_HUMAN; Q9WUE3, C56D2_MOUSE; DR Q641Y1, C56D2_RAT ; A5D9A7, CYAC3_BOVIN; A3KPR5, CYAC3_DANRE; DR Q8NBI2, CYAC3_HUMAN; Q6P1H1, CYAC3_MOUSE; Q5U2W7, CYAC3_RAT ; DR Q503V1, CYBR1_DANRE; Q53TN4, CYBR1_HUMAN; Q925G2, CYBR1_MOUSE; DR Q5RAJ4, CYBR1_PONAB; Q5RKJ2, CYBR1_RAT ; Q6DDR3, CYBR1_XENLA; DR Q5CZL8, CYBR1_XENTR; //