formate + L-methionine => N(alpha)-formyl-L-methionine + H2O
formate + l-methionine => n(alpha)-formyl-l-methionine + h2o
formate + L-methionine => N(alpha)-formyl-L-methionine + H2O
formate + l-methionine => n(alpha)-formyl-l-methionine + h2o