papain solubilization of rat ag-b histocompatibility antigens produces ag-b molecules of about 59,000 daltons which have been shown to contain two fragments bound noncovalently : one fragment about 37,000 daltons carrying ag-b allospecificity , and another about 11,000 daltons , an apparent rat homologue of human beta2-microglobulin .
C0086418
human
C1417683
beta2