TY - RPRT TI - A simple, general procedure for purifying restriction endonucleases. AU - T A Bickle AU - V Pirrotta AU - R Imber PY - 1977 DO - 10.1093/nar/4.8.2561 UR - https://pubmed.ncbi.nlm.nih.gov/909783/ ID - 909783 ER -