we compare our model with an alternative scheme [ hill , t. l. & carlier , m. f. ( 1983 ) proc . natl . acad . sci . usa 80 , 7234-7238 ] , which interprets the effects of gdp on microtubule assembly using a reaction scheme in which gdp is able to exchange with gtp in gtp-containing tubulin subunits in the microtubule and in which the principal gtpase occurs in gtp-containing tubulin subunits at the microtubule/solution interface .
C0041348
tubulin
C0026046
microtubule