Profile: Ziyun Chemicals Co., Ltd. is a fine chemicals company that specializes in the development, manufacturing and marketing of fine organic compounds & intermediates of pharmaceuticals. Our products include 3-(2-pyridyl)-alanine, 3,4-dichloro-phenylalanine, 5-chloro-2.3.3-trimethyl-indolenine, 1,1-carbonyldiimidazole, n-(trimethylsilyl)imidazole, 2-methylimidazole, 2-methyl-5-nitroimidazole, 2-ethyl-4-methylimidazole and 1-isopropylimidazole. Amino acids play central roles both as building blocks of proteins and as intermediates in metabolism. The chemical properties of the amino acids of proteins determine the biological activity of the protein. Proteins not only catalyze all of the reactions in living cells, but they also virtually control all cellular process.