information on the power of rotation of three poly-peptides composed of three amino-acids. At the same time the optical relations of the individual decomposites are given.
The explanation of our example (3) illustrates the others as well. The tripeptide d-alanyl-glycyl-glycin rotates +30°. If glycin (==glycocoll) were first split off by a ferment, then the dipeptide d-alanyl-glycin (see p. 53 (I)) would appear. The rotation of the solution would rise towards the right, because d-alanyl-glycin turns further to the right than the original material. If, on the contrary, d-alanin were set free first, then the rotation would soon decrease to 0°, as the resulting dipeptide glycyl-glycin is optically inactive (see p. 53 (2)).
with the chemistry of albumen, with studies in immunity, with bacteriology, and so on, but which fails simply through lack of means for the upkeep of a small army of capable young chemists.
