TY - RPRT TI - Lambda repressor recognizes the approximately 2-fold symmetric half-operator sequences asymmetrically. AU - A Sarai AU - Y Takeda PY - 1989 DO - 10.1073/pnas.86.17.6513 UR - https://pubmed.ncbi.nlm.nih.gov/2771938/ ID - 2771938 ER -