title: External morphology of Azotobacter vinelandii during cyst formation.
mesh_terms: D001395:Azotobacter / Q000166:cytology* / Q000254:growth & development; D001431:Bacteriological Techniques; D002473:Cell Wall; D003593:Cytoplasm; D003594:Cytoplasmic Granules; D005613:Freeze Etching; D006885:Hydroxybutyrates; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning
chemical_list: D006885:Hydroxybutyrates