Specificity:Recognizes the Melanoma Associated Antigen, a molecular complex consisting of two bands with MW of 150kD and 90kD respectively (reduced 4 subunits 120kD, 95kD, 29kD and 25kD). Reacts strongly with melanoma cells derived from cell lines and short term cultures. Reacts with a proportion of naevi and with endothelial cells of small vessels.