Which of the following cytoskeletal proteins is needed for anchoring one cell to another (by means of desmosomes), but is not needed for any cellular movements (like phagocytosis, ciliary motion, etc.)? A. keratin (an intermediate filament protein)
B. -tubulin (a microtubule protein)
C. actin (a microfilament protein)
D. -tubulin (a microtubule protein)
E. all of the above proteins are needed for anchoring one cell to another