In a previous communication experiments were described in which several substances structurally related to glutamic acid were tested for the inhibition of utilization of glutamic acid by Lactobacillus arabinosus (1). In the present communication these substances, together with a number of others, were tested for their inhibition of bacterial glutamic decarboxylase. The mechanisms of action of a...

This method is based on the fact that glutamic acid can be converted to pyrrolidonecarboxylic acid under conditions which do not affect other amino acids, except cystine and cysteine. The corresponding decrease in amino nitrogen, corrected for cystine, can be used to estimate the amount of glutamic acid in protein hydrolysates. By the use of the Van Slyke manometric apparatus, the method is app...

The existence of a glutamic acid racemase activity in Lactobacillus arabinosus has been reported by Narrod and Wood (1) and by Ayengar and Roberts (2). As has been pointed out by Meister (3) these observations with dried cell preparations would not exclude a mechanism for glutamic acid racemization in which alanine racemase is coupled with n-glutamic acid-nalanine transaminase and n-glutamic ac...