[thioredoxin]-disulfide + L-methionine + H2O = L-methionine (R)-S-oxide + [thioredoxin]-dithiol
[thioredoxin]-disulfide + l-methionine + h2o = l-methionine (r)-s-oxide + [thioredoxin]-dithiol
"free met-R-(o) reductase"
"free met-r-(o) reductase"