title: Effect of penicillin concentration on "protoplast" production of Streptococcus faecalis.
mesh_terms: D013293:Enterococcus faecalis / Q000187:drug effects*; D010400:Penicillin G / Q000494:pharmacology*; D011523:Protoplasts / Q000187:drug effects*
chemical_list: D010400:Penicillin G