欧美国产日韩在线免费观看-欧美日韩成人激情一区二区-欧美久久综合一区二区-亚洲av寂寞少妇久久

Glutathione S-transferases （GSTs）, previously known as ligandins, are a family of eukaryotic and prokaryotic phase II metabolic isozymes best known for their ability to catalyze the conjugation of the reduced form of glutathione （GSH） to xenobiotic substrates for the purpose of detoxification [PMID: 15717864]. A GST-tag is often used to separate and purify proteins that contain the GST-fusion protein. The tag is 220 amino acids （roughly 26 kDa） in size, which, compared to tags such as the Myc-tag or the FLAG-tag, is quite large. It can be fused to either the N-terminus or C-terminus of a protein.