1993a-879 archaealproteins bacterialproteins carcinogenesis cellularsignaltransduction cytogenetics cytoplasmicfilaments cytoskeleton developmentalbiology drugeffects etiology fibrouscomposites formation glycoproteins gproteins gtp-bindingproteins intermediatefilamentproteins intermediatefilaments laboratorymanuals metabolism molecularbiology neoplasms physiology prokaryotes prokaryoticcells qu25i5052004 qu350 qz202g1051998 rasproteins signaltransduction ultrastructure