ID 1.8.4.14 DE L-methionine (R)-S-oxide reductase. AN Free met-R-(o) reductase. AN Free-methionine (R)-S-oxide reductase. AN FRMsr. CA L-methionine + thioredoxin disulfide + H(2)O = L-methionine (R)-S-oxide + CA thioredoxin. CF NADPH. CC -!- Unlike EC 1.8.4.12 this enzyme cannot use peptide-bound methionine CC (R)-S-oxide as a substrate. CC -!- Differs from EC 1.8.4.13, in that L-methionine (S)-S-oxide is not a CC substrate. CC -!- Formerly EC 1.8.4.5. //