title: Circadian rhythm of chloroplast ultrastructure in Gonyaulax polyedra, concentric organization around a central cluster of ribosomes.
mesh_terms: D002467:Cell Nucleus / Q000648:ultrastructure; D002736:Chloroplasts / Q000648:ultrastructure*; D002940:Circadian Rhythm; D003584:Cytological Techniques; D003593:Cytoplasm / Q000648:ultrastructure; D004141:Dinoflagellida / Q000166:cytology / Q000648:ultrastructure*; D004777:Environment; D056890:Eukaryota / Q000648:ultrastructure*; D006056:Golgi Apparatus / Q000648:ultrastructure; D008027:Light; D008854:Microscopy, Electron; D012270:Ribosomes / Q000648:ultrastructure*