Abstract
A search for new genes was performed in a 220-kb region around the tumor necrosis factor gene cluster in the human central major histocompatibility complex region using a cDNA hybridization and selection method. In addition to the seven known genes in this region, we identified a new gene that is preferentially expressed in spleen. We also identified two pseudogenes that have high degrees of homology to cytokeratin and cyclophillin, respectively. Expressed sequences for a human homologue of the mouse B144 gene were also found in the current analysis. RT-PCR analysis showed that B144 is expressed in spleen, in thymus, and prominently in the macrophage cell line, U937. We also independently identified the BAT1 gene to be the well-conserved homologue of a previously described rat liver nuclear protein.
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