title: Mesosomes observed in unfixed cells of Staphylococcus aureus by negative staining.
mesh_terms: D002462:Cell Membrane / Q000648:ultrastructure; D002478:Cells, Cultured; D013194:Staining and Labeling / Q000379:methods*; D013211:Staphylococcus aureus / Q000648:ultrastructure*