title: Lipoprotein crystals in the yolk platelet of a teleost, Pelvicachromis pulcher (Cichlidae).
abstract: Yolk-platelt crystals in the oocytes of the teleost Pelvicachromis pulcher (Cichlidae) were shown, using electron diffraction and tilting of thin-sectioned specimens, to possess an orthorhombic lattice with unit-cells sides a = 8.3 nm, b = 16.6 nm and c = 18.0 nm. They thus closely resemble the crystals known for a newt (Triturus sp.) and a frog (Xenopus laevis).
mesh_terms: D000818:Animals; D003460:Crystallization; D004527:Egg Proteins / Q000032:analysis; D004530:Egg Yolk / Q000032:analysis*; D005260:Female; D005399:Fishes / Q000033:anatomy & histology*; D008074:Lipoproteins / Q000032:analysis*; D009865:Oocytes / Q000032:analysis*; D010063:Ovum / Q000032:analysis*
chemical_list: D004527:Egg Proteins; D008074:Lipoproteins