abstract |
FIELD: biotechnology. SUBSTANCE: a process for preparing a product such as proinsulin S-sulfonate with a higher yield obtained by simpler technology. This is achieved by carrying out chromatography with an ethylene glycol- dimethacrylate-2-hydroxy-3-diethylaminopropyl methacrylate copolymer, and elution, with a sulfuric acid-containing solution. EFFECT: greater efficiency of the process. 2 cl, 1 dwg, 2 tbl |