injection of the alpha , beta-nonhydrolyzable gtp analog , guanosine 5'- [ alpha , beta-methylene ] triphosphate ( pp [ ch2 ] pg ) into ptk2 , a549 , and swiss 3t3 cells produced dramatic changes in the normal pattern of long radiating microtubules displayed by the cells before injection .
C0026046
microtubules
C0007634
cells