title: Membrane affinity chromatography used for the separation of trypsin inhibitor.
abstract: Polysulphone (PS) was chemically modified by acrylation-amination and by chloromethylation-amination, respectively. An ultrafiltration membrane of chemically modified polysulphone (CMPS) was prepared by the phase inversion method. Trypsin was then covalently bonded onto the CMPS membrane by diazotization. The activity of immobilized trypsin reaches up to 10200 U/g; 15 mg trypsin was immobilized on 1 g CMPS membrane. Separation of soybean trypsin inhibitor was carried out on the affinity membrane, yielding 6.5 mg pure trypsin inhibitor in one run. The enzyme membrane has good activity and stability.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
authors.forename: W
authors.initials: W
authors.lastname: Guo
authors.forename: Z
authors.initials: Z
authors.lastname: Shang
authors.forename: Y
authors.initials: Y
authors.lastname: Yu
authors.forename: Y
authors.initials: Y
authors.lastname: Guan
authors.forename: L
authors.initials: L
authors.lastname: Zhou
mesh_terms: D002846:Chromatography, Affinity; D004800:Enzymes, Immobilized / Q000378:metabolism; D005583:Fourier Analysis; D008567:Membranes, Artificial; D008854:Microscopy, Electron; D013055:Spectrophotometry, Infrared; D014361:Trypsin Inhibitors / Q000302:isolation & purification*; D014462:Ultrafiltration
chemical_list: D004800:Enzymes, Immobilized; D008567:Membranes, Artificial; D014361:Trypsin Inhibitors