microtubules assembled in the presence of [ ( 3 ) h ] taxol bind drug specifically with an apparent binding constant , k ( app ) , of 8.7 x 19 ( -7 ) m and binding saturates with a calculated maximal binding ration , b ( max ) , of 0.6 mol taxol bound/mol tubulin dimer .
C0026046
microtubules
C0041348
tubulin