TY - RPRT TI - Thymidine kinase mutants obtained by random sequence selection. AU - K M Munir AU - D C French AU - L A Loeb PY - 1993 DO - 10.1073/pnas.90.9.4012 UR - https://pubmed.ncbi.nlm.nih.gov/8387207/ ID - 8387207 ER -