The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Simultaneous oxidative reaction crystallization of L-cystine from L-cysteine with enzyme reactions from DL-amino-thiazoline-carboxylic acid》. Authors are Kumon, S.; Shirota, T.; Kitahara, T..The article about the compound:2-Amino-4,5-dihydrothiazole-4-carboxylic acidcas:2150-55-2,SMILESS:O=C(C1N=C(N)SC1)O).COA of Formula: C4H6N2O2S. Through the article, more information about this compound (cas:2150-55-2) is conveyed.
A novel system for oxidative reaction crystallization of L-cystine (CySSCy) from L-cysteine (CySH) obtained by simultaneous enzyme reaction was studied. L-cysteine was produced from DL-amino-thiazoline-carboxylic acid (ATC) by enzymes in the same cell grown beforehand. Generally, the processes involving oxidation after enzyme reactions are time consuming and yield small size CySSCy crystals. In the present investigation oxygen was fed simultaneously along with the enzyme reaction in such a way that it was matched both with the production and oxidation rates of CySH yielding CySSCy at an optimum rate, thus minimizing the level of dissolved oxygen which suppresses the activities of the oxygen-sensitive enzymes. As a result, the overall reaction time was reduced and large size CySSCy crystals were obtained, while improving the enzyme reaction yield.
As far as I know, this compound(2150-55-2)COA of Formula: C4H6N2O2S can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.