Abstract
Products of rabbitRLA-11 histocompatibility genes were isolated from rabbit lymphoid tumor cells (RL-5) and characterized. The tumor cells were grown in culture with radioactive amino acids and were lysed by treatment with the detergent NP-40. Glycoprotein molecules were isolated by affinity chromatography using immobilized lentil lectin. Chromatography on purified sheep anti-rabbit beta-2-microglobulin yielded a 43,000 dalton glycoprotein fraction, designated RLA-11gp, which was noncovalently associated with beta-2-microglobulin. N-terminal amino acid sequence analysis using radiochemical methods allowed assignment of 28 of the N-terminal 35 residues. The data revealed 89% homology of the RLA-11gp N-terminus with that of the human HLA-B7 and 82% with the mouse H-2Kb histocompatibility antigens. Comparison of the RLA-11 gp N-terminal sequence data obtained in this work to sequence data reported for major histocompatibility complex antigens of other species revealed no amino acid substitutions unique to the rabbit antigens.
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