Emission spectra of tubulin in monomeric form (dotted curve), in taxol-induced polymer (dashed curve) and in 2-AB-taxol-induced polymer (solid curve) in PMEG buffer. The concentrations of 2-AB-taxol and tubulin were 30 M and 10 M, respectively. The excitation wavelength was 450 nm. Inset: The region from 410 - 550 nm of the dashed and solid curves, enlarged to show emission from 2-AB-taxol bound to the polymer.

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