title: The ultrastructure of nuclear differentiation during spermiogenesis in salmon.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin; D008297:Male; D008854:Microscopy, Electron; D012474:Salmon / Q000033:anatomy & histology*; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure*
chemical_list: D002843:Chromatin