SOME ELECTRICAL PROPERTIES OF A NUCLEAR MEMBRANE EXAMINED WITH A MICROELECTRODE.
Electrical potential and resistance were measured with microelectrodes in in situ and isolated nuclei of gland cells of Drosophila flavorepleta. The nucleus-cytoplasm boundary was found to be rather impermeable to ion diffusion. It presents a resistance of the order of 1 ohm cm(2) and sustains a "resting" potential, the nucleoplasm being about 15 mv negative with respect to the cytoplasm. Both the resistance and potential appear to be associated with the nuclear membrane: the potential declines to zero and the resistance to a fraction of its original value, when the membrane is perforated experimentally.
D000818:Animals; D002467:Cell Nucleus; D003593:Cytoplasm; D004330:Drosophila; D004594:Electrophysiology; D007477:Ions; D008564:Membrane Potentials; D008839:Microelectrodes; D009685:Nuclear Envelope; D012469:Salivary Glands
D007477:Ions
CELL NUCLEUS; DROSOPHILA; ELECTROPHYSIOLOGY; IONS; PROTOPLASM; SALIVARY GLANDS