TY - RPRT TI - Functionally acceptable substitutions in two alpha-helical regions of lambda repressor. AU - J F Reidhaar-Olson AU - R T Sauer PY - 1990 DO - 10.1002/prot.340070403 UR - https://pubmed.ncbi.nlm.nih.gov/2199970/ ID - 2199970 ER -