Lobigs, Mario; Chelvanayagam, Gareth; Mullbacher, Arno
We have tested the hypothesis that MHC class I molecules are actively involved as protease in the production of natural MHC class I ligands. First, the structure of a class I molecule was analyzed for homology with catalytic sites of known proteases. While several clusters of amino acids in the restriction element resembled protease active sites, structural discrepancies and the influence of nearby residues suggest that these sites are unlikely to have protease activity. Second, we have tested...[Show more]
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