title: Morphological observations on cultured lampbrush-stage Rana pipiens oocytes.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D002478:Cells, Cultured; D002875:Chromosomes / Q000648:ultrastructure; D005260:Female; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D009865:Oocytes / Q000648:ultrastructure*; D010063:Ovum / Q000648:ultrastructure*; D011894:Rana pipiens; D012261:Ribonucleoproteins
chemical_list: D012261:Ribonucleoproteins