AN, CELL, CELLULAR, CRYOFIXATION, CRYOFIXED, DIDELPHI, DON, E, E-FACE, ECTOPLASMIC, ELECTRON, FACE, FAWCETT, FRACTURE, FRACTURED, FREEZE, FREEZE-FRACTURE, FREEZE-FRACTURED, HISTOLOGY, IMAGING, IN, INTRAMEMBRANE, MEDICAL, MEMBRANE, MICROGRAPH, MICROGRAPHY, MICROSCOPY, MIDPIECE, OF, OPOSSUM, P-FACE, PARTICLE, PROTOPLASMIC, REPLICA, SCIENCE, SPERM, TEM, THE, TRANSMISSION, VIRGINIANA,