title: Ribonuclease U 4  from Ustilago sphaerogena. Purification and physical properties.
mesh_terms: D001487:Basidiomycota / Q000201:enzymology*; D002241:Carbohydrates / Q000032:analysis; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004589:Electrophoresis, Disc; D008970:Molecular Weight; D012260:Ribonucleases / Q000032:analysis / Q000302:isolation & purification; D013056:Spectrophotometry, Ultraviolet; D014461:Ultracentrifugation
chemical_list: D002241:Carbohydrates; D012260:Ribonucleases