Xi 'an langene biological technology co., LTD is registered in  xi 'an high-tech industrial development zone students pioneer park of high-tech enterprises. Company is mainly engaged in high purity scale synthesis, modification and preparation of biologically active peptides and polypeptides cosmetics, protective amino acids, condensing agent and its intermediate products such as production, to provide custom synthesis and drug approval services. The company is committed to peptide synthesis and preparation technology and so on series products of technol...