title: Development of membrane differentiations in the guinea pig spermatid during spermiogenesis.
mesh_terms: D000177:Acrosome / Q000648:ultrastructure; D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D002784:Cholesterol / Q000032:analysis; D005614:Freeze Fracturing; D006168:Guinea Pigs / Q000502:physiology*; D007425:Intracellular Membranes / Q000648:ultrastructure; D008297:Male; D008566:Membranes / Q000032:analysis / Q000502:physiology; D013087:Spermatids / Q000032:analysis / Q000502:physiology* / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000502:physiology*
chemical_list: D002784:Cholesterol