The aminoterminal domain of alpha-tubulin probed by monoclonal antibodies. Recognition of a rarely exposed epitope by the monoclonal antibody 111 B52 C2

The production and identification of a monoclonal antibody, 111 B52 C2, raised against fragments obtained after limited proteolysis of purified tubulin is described. The recognized epitope is located on the aminoterminal domain of the α-tubulin subunit and differs from the antigenic sites reacting with the presently existing panel of available monoclonal antibodies. This monoclonal antibody thus constitutes a potentially useful tool to explore interaction between tubulin and other specific ligands.