Abstract
It is well-known result that addition of several antibiotics or surface-active agents into fermenting broth causes good production of L-glutamic acid under excess amount of biotin. The author also tested the effect of sodium salts of several bile acids, surfaceactive agents, by using Micrococcus glutamicus ATCC 13058 on synthetic medium in which excess biotin was contained. As the result of the test, it was found that deoxycholate was most effective for L-glutamic acid production, chenodeoxycholate was second, and other bile salts, namely, cholate, taurocholate and glycocholate, were almost not effective.
