title: The purification of restriction endonuclease EcoRI by precipitation involving polyethyleneimine.
mesh_terms: D001426:Bacterial Proteins / Q000302:isolation & purification; D004262:DNA Restriction Enzymes / Q000302:isolation & purification* / Q000378:metabolism; D004269:DNA, Bacterial / Q000302:isolation & purification; D004720:Endonucleases / Q000302:isolation & purification*; D004926:Escherichia coli / Q000201:enzymology*; D011094:Polyethyleneimine; D012329:RNA, Bacterial / Q000302:isolation & purification
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D012329:RNA, Bacterial; D011094:Polyethyleneimine; D004720:Endonucleases; D004262:DNA Restriction Enzymes