Abstract

Microtubule-interacting proteins have been studied from a pancreas supernatant. These proteins were first identified by affinity chromatography on taxol-stabilized microtubules. Among these interacting polypeptides, we show, for the first time, the presence of a protein which has a molecular mass of 67 kDa, as determined by polyacrylamide slab gel electrophoresis. The heat stability and the ability of this 67 kDa polypeptide to copolymerize with phosphocellulose-purified tubulin suggest that this protein may be a microtubule-associated protein.

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