Partial molecular characterization of an antigenic structure associated to cells of common acute lymphocytic leukaemia (ALL).

A heteroantiserum against common human acute lymphocytic leukaemia (ALL) cells was raised in rabbits. This antiserum was rendered specific for common ALL cells by extensive absorption with different human tissue. A specific antigen associated to common ALL cells was solubilized by sodium deoxycholate from ALL plasma membranes and identified by indirect immunofluorescence. By analytical chromatography, two antigenically active peaks were found. The apparent molecular weights were calculated to be 55,000 and 110,000.