Engstrom, Joyce E.2023-06-272023-06-271982https://hdl.handle.net/1805/34034This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).en-USMutation (Biology)Escherichia coliMutationThesis