TY - RPRT TI - A facile and reversible method to decrease the copy number of the ColE1-related cloning vectors commonly used in Escherichia coli. AU - M F Henry AU - J E Cronan PY - 1989 DO - 10.1128/jb.171.10.5254-5261.1989 UR - https://pubmed.ncbi.nlm.nih.gov/2551884/ ID - 2551884 ER -