in a mutant e. coli strain, a protein that normally resides in the inner membrane is mis-localized to the cytoplasm. all other proteins show normal localization. the most probable defect in this mutant strain is that the . . . choose one: a. sigma factor that helps transcribe this protein is missing. b. signal recognition particle is missing. c. ribosomes in this cell are defective. d. amino terminal signal sequence is missing from this protein.
