Paclitaxel's (Taxol) usefulness as a laboratory tool is well established and lies in its ability to inhibit microtubule depolymerization. Thus, taxol stabilized microtubules are used as substrates for the identification and characterization of the ever increasing number of microtubule associated proteins.nPaclitaxel is provided as a lyophilized powder. When resuspended in DMSO (not included) the paclitaxel is at 2 mM concentration.