TY - RPRT TI - Ab initio calculations on large molecules using molecular fragments. Structural correlations between natural substrate moieties and some antibiotic inhibitors of peptidyl transferase. AU - B V Cheney PY - 1974 DO - 10.1021/jm00252a005 UR - https://pubmed.ncbi.nlm.nih.gov/4829939/ ID - 4829939 ER -