ID 1.8.4.14 DE L-methionine (R)-S-oxide reductase. AN free-methionine (R)-S-oxide reductase. AN free met-R-(o) reductase. AN FRMsr. CA [thioredoxin]-disulfide + H2O + L-methionine = [thioredoxin]-dithiol + CA L-methionine (R)-S-oxide. 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. DR P36088, FRMSR_YEAST; Q802G6, MSB1A_DANRE; Q3MHL9, MSRB1_BOVIN; DR Q9NZV6, MSRB1_HUMAN; Q9JLC3, MSRB1_MOUSE; A1E952, MSRB1_PIG ; DR Q5R869, MSRB1_PONAB; Q52KJ8, MSRB1_RAT ; Q6NW52, MSRB2_DANRE; DR Q9Y3D2, MSRB2_HUMAN; Q78J03, MSRB2_MOUSE; Q4FZX5, MSRB2_RAT ; DR Q8IXL7, MSRB3_HUMAN; Q8BU85, MSRB3_MOUSE; Q5R930, MSRB3_PONAB; DR P76270, MSRC_ECOLI ; //