Under the direction of Professor Roberts, CoEBio3, UK, Guilin Peptide Technology Limited owns a proprietary technology for making polyamino acids of unique quality, economically in commercial scale. alpha,gamma-poly(L-glutamic acid) Mw 20000-40000(based on viscosity) White crystal non-cytotoxicity(MTT) Purity: 99.9%(HPLC) Source: chemically synthetic 150USD/20g, 1050USD/Kg