TY - RPRT TI - lac repressor acts by modifying the initial transcribing complex so that it cannot leave the promoter. AU - J Lee AU - A Goldfarb PY - 1991 DO - 10.1016/0092-8674(91)90122-f UR - https://pubmed.ncbi.nlm.nih.gov/1878972/ ID - 1878972 ER -