title: [Large-scale purification, crystallization and some physicochemical properties of extracellular guanyl-RNases C2 and Pch1].
abstract: The purification of RNase C2 from 76.5 1 of Asp. clavatus cultural fluid and RNase Pch1 from 160 1 of Pen. chrysogenum 152 A cultural fluid was described. 1150-fold purification of RNase C2 was attained by precipitation with ammonium sulfate, ion-exchange chromatography and rechromatography on DEAE-cellulose, gel chromatography on Sephadex G-75, and crystallization from diluted acidic buffer. During the preparation of RNase Pch1 additional chromatography on CM-cellulose was used before crystallization, the purification being 2220-fold. It was obtained 600 mg RNase C2 and 900 mg RNase Pch1. Some physico-chemical properties of crystalline RNases were studied.
mesh_terms: D001230:Aspergillus / Q000201:enzymology*; D055598:Chemical Phenomena; D002621:Chemistry; D003460:Crystallization; D003470:Culture Media; D010407:Penicillium / Q000201:enzymology*; D010408:Penicillium chrysogenum / Q000201:enzymology*; D006163:Ribonuclease T1 / Q000302:isolation & purification*; D012260:Ribonucleases / Q000302:isolation & purification*; D013045:Species Specificity
chemical_list: D003470:Culture Media; D012260:Ribonucleases; D006163:Ribonuclease T1
vernacular_title: Krupnomasshtabnaia ochistka, kristallizatsiia i fiziko-khimicheskie svoĭstva vnekletochnykh guanil-RNKaz C2 i Pch1.