title: Further observations on the ultrastructure of Treponema pallidum nichols.
mesh_terms: D001419:Bacteria / Q000201:enzymology; D001647:Bile Acids and Salts; D003902:Detergents; D005407:Flagella / Q000166:cytology*; D008854:Microscopy, Electron; D010447:Peptide Hydrolases; D014210:Treponema pallidum / Q000166:cytology*
chemical_list: D001647:Bile Acids and Salts; D003902:Detergents; D010447:Peptide Hydrolases