Recommanded Product: 2150-55-2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 2-Amino-4,5-dihydrothiazole-4-carboxylic acid, is researched, Molecular C4H6N2O2S, CAS is 2150-55-2, about Two-Stage Cultivation of Pseudomonas sp. F12 for the Production of Enzymes Converting DL-2-Amino-Δ2-thiazoline-4-carboxylic Acid to L-Cysteine. Author is Fan, Cuili; Li, Zhimin; Ye, Qin.
Pseudomonas sp. F12 isolated from soil can transform DL-2-amino-Δ2-thiazoline-4-carboxylic acid (DL-ATC) to L-cysteine. It can grow in minimal medium containing DL-ATC as the sole carbon and nitrogen source, and the apparent activity of L-cysteine synthesis (CS) achieved 122 U/mL in a 5-L bioreactor. Pseudomonas sp. F12 can utilize glucose as carbon source and ammonia as nitrogen source for growth, but no CS activity was formed. To reduce the cost of DL-ATC, the cultivation process was divided into a growth stage on glucose and ammonia and a production stage induced by DL-ATC. The excessive glucose led to the production of byproduct(s) which seriously inhibited cell growth and CS production Ammonium was accumulated when DL-ATC was consumed, and ammonium did not inhibit CS activity formation until 60 mM. Based on the above features, fed-batch cultivation of the growth stage was developed by supplying glucose restrictively. The volumetric CS activity was enhanced more than two times that obtained under the initial conditions.
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