The question of the structure of methionine, the sulfur-containing amino acid first isolated from protein by Mueller,'was rather conclusively settled by the work of Barger and Coyne. 2 They synthesized?-methylthiol-a-amino-n-butyric acid and showed that this substance was undoubtedly the racemic form of natural methionine. The new method of synthesis3 of this amino acid which has recently been described has made available a considerable ...
