title: Pore patterns on nuclear membranes.
mesh_terms: D002460:Cell Line; D002467:Cell Nucleus; D005260:Female; D005613:Freeze Etching; D006367:HeLa Cells; D006801:Humans; D008214:Lymphocytes; D008545:Melanoma; D008566:Membranes; D008854:Microscopy, Electron; D008938:Mitosis; D013997:Time Factors