PT - JOURNAL ARTICLE AU - Lampson, L A AU - Levy, R TI - Two populations of Ia-like molecules on a human B cell line. DP - 1980 Jul 01 TA - The Journal of Immunology PG - 293--299 VI - 125 IP - 1 4099 - http://www.jimmunol.org/content/125/1/293.short 4100 - http://www.jimmunol.org/content/125/1/293.full SO - J. Immunol.1980 Jul 01; 125 AB - Evidence is presented for two populations of Ia-like molecules on the human B cell line Raji. Two monoclonal antibodies, L203 and L227, are described. Both recognize nonpolymorphic determinants on B cell antigens. Both immunoprecipitate 34,000- and 28,000-dalton material from 125I-labeled extracts of Raji, but L227 precipitates 25,000-dalton material as well. Immunodepletion experiments confirm that the antibodies react with two different populations of molecules.