Xi'an Langene Bioscience Co.Ltd specialized in peptide synthesis, API peptide , Resins for solid phase peptide synthesis, intermediates , affinity chromatography Functional Microbeads, (Non toxic) Chloromethyl Reagent [1, 4-2-bis (chloromethoxy) butane], anti-age products, langene established in 2004, we have professional R&D team , some produncts such as API peptide , SPPS resins and its intermediates are manufactured with the most advanced technology in china and we become one of leading supplier in peptide market all over the world.