Abstract
Four monoclonal antibodies raised to alpha subunit of pig brain tubulin (TU-01, TU-02, TU-03, TU-04) were used to study immunohistochemical heterogeneity of alpha tubulin in human epithelia. Selective reactivity was detected in the skin and trachea/bronchi, whereas all other epithelia investigated reacted uniformly with all four monoclonal antibodies. In the skin TU-01 reacted very strongly with all layers except the basal layer; TU-02 reacted strongly with granular layer and was unreactive or only weakly reactive with others; TU-03 reacted very strongly with basal layer and weakly to moderately with superficial layers; TU-04 reacted strongly with the granular layer of epidermis and was unreactive with other layers. In the trachea and major bronchi TU-01 reacted with the entire epithelial layer; TU-02 reacted only with superficial layer; TU-03 reacted with superficial and basal layer; TU-04 reacted only with superficial layer. Different staining patterns obtained with these four monoclonal antibodies indicate that there is immunohistochemical heterogeneity of alpha tubulin in some but not all normal human epithelia.
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