intact outer doublet microtubules bound less than 0.001 mol of colchicine per mol of tubulin contained in the microtubules , under conditions where soluble tubulin would have bound 1 mol of colchicine per mol of tubulin ( saturating concentration of colchicine , no decay of colchicine binding activity ) .
C0026046
microtubules
C0041348
tubulin