Isolation of a novel poly--glutamic acid-producing A14 strain and optimization of fermentation conditions for high-level production.

In the present study, bacteria producing poly--glutamic acid were isolated from marine sands, and an efficient producer identified. -PGA was rapidly screened by thin-layer chromatography and UV spectrophotometer assay. Media optimization was carried out, and for the cost-effective production of -PGA, monosodium glutamate was used as the substrate for the synthesis of -PGA instead of glutamic acid.