title: Nuclear envelope permeability.
abstract: The permeability of the amphibian oocyte nuclear envelope in situ has been determined for three tritiated dextrans. The envelope is a sieve, restricting molecular movement between the cytoplasm and nucleus. The patent radius of its pores is about 45å.
mesh_terms: D000663:Amphibians; D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism* / Q000648:ultrastructure; D003593:Cytoplasm / Q000378:metabolism; D003911:Dextrans / Q000378:metabolism*; D004058:Diffusion; D005260:Female; D007700:Kinetics; D046911:Macromolecular Substances; D008566:Membranes / Q000378:metabolism; D010063:Ovum / Q000648:ultrastructure*; D010316:Particle Size; D010539:Permeability; D014316:Tritium
chemical_list: D003911:Dextrans; D046911:Macromolecular Substances; D014316:Tritium