Bundles of one type of these proteins form the Rosenthal fibers found in pilocytic astrocytomas; that same protein is mutated in Alexander's disease and is called glial fibrillary acidic protein or GFAP. Monomers of these proteins have an alpha-helical rod domain which connects the amino terminus with the carboxyl terminus, and the rod domains dimerize to form a coiled coil. Another type of them is mutated in Hutchinson-Gilford progeria, and the most ubiquitous of them is vimentin. Types I and II of these (*) structures are bundles of acidic and basic keratin, while type V includes the lamins which provide structure to the inner nuclear membrane. They have diameter around 10nm, making them smaller than microtubules 
Bundles of one type of these proteins form the Rosenthal fibers found in pilocytic astrocytomas; that same protein is mutated in Alexander's disease and is called glial fibrillary acidic protein or GFAP. Monomers of these proteins have an alpha-helical rod domain which connects the amino terminus with the carboxyl terminus, and the rod domains dimerize to form a coiled coil. Another type of them is mutated in Hutchinson-Gilford progeria, and the most ubiquitous of them is vimentin. Types I and II of these (*) structures are bundles of acidic and basic keratin, while type V includes the lamins which provide structure to the inner nuclear membrane. They have diameter around 10nm, making them smaller than microtubules but larger than actin filaments. For 10 points, identify these fibrous cytoskeletal proteins.
Bundles of one type of these proteins form the Rosenthal fibers found in pilocytic astrocytomas; that same protein is mutated in Alexander's disease and is called glial fibrillary acidic protein or GFAP.
Intermediate filaments or IFs [anti-prompt on keratins, GFAP, nuclear lamins, and cytokeratins before mention]