Two Erythromycin-resistance Plasmids of Diverse Origin and Their Effect on Sporulation in Bacillus subtilis

A Bacillus subtilis plasmid capable of producing phenotypic erythromycin resistance was compared with an Eryr staphylococcal plasmid. The two plasmids did not interfere with the sporulation process in B. subtilis, in contrast to chromosomal erythromycin mutations.