TY - RPRT TI - Effect of lambda packaging extract mcr restriction activity on DNA cloning. AU - P L Kretz AU - C H Reid AU - A Greener AU - J M Short PY - 1989 DO - 10.1093/nar/17.13.5409 UR - https://pubmed.ncbi.nlm.nih.gov/2548161/ ID - 2548161 ER -