Ampicillin, like other β-lactam antibiotics, not only blocks the division of bacteria, but also the division of chloroplasts of the glaucophytes (called cyanelles) and chloroplasts of the moss Physcomitrella patens, a bryophyte.
It feeds on the algae Acetabularia acetabulum (from which it keeps the chloroplasts, that are able to continue photosynthesis in the slug's tissues) and Padina pavonia.
RsfS proteins are found in almost all eubacteria (but not archaea) and homologs are present in mitochondria and chloroplasts (where they are called C7orf30 and iojap, respectively).
Although plastids are prokaryotic descendants and still have their prokaryotic translational machinery, SD-like sequences are not required in green alga Chlamydomonas reinhardtii chloroplasts.