1912 Journal of the American Chemical Society  
NEW BOOKS. 845 1 A large number of experiments were carried out in which glycine, alanine, phenylalanine, and tyrosine, in the presence and absence of acids and alkalis in solutions of known H+ ion concentration, and also in the presence of phosphates, were dissolved with cane sugar in water and the optical rotations determined at stated intervals. No evidence was obtained in any of these experiments to show that the amino acid affected the course of the hydrolysis of the cane sugar in any way.
doi:10.1021/ja02207a014 fatcat:up77eiz6nvcq3luwe7kliupso4