title: The cytoplasm and its matrix.
authors.affiliation: Department of Biology, University of Pennsylvania, Philadelphia 19104-6018.
authors.forename: K R
authors.initials: KR
authors.lastname: Porter
mesh_terms: D000818:Animals; D002460:Cell Line; D003593:Cytoplasm / Q000648:ultrastructure*; D008854:Microscopy, Electron / Q000379:methods; D008870:Microtubules / Q000648:ultrastructure