| 摘要 |
The present invention relates generally to the identification and characterization of new genes and proteins. More particularly, the present invention relates to the discovery of novel members of the nuclear hormone receptor superfamily and cDNA clones thereof. The family members are designated as H-2RIIBP (or RXR beta , retinoid x receptors). These proteins bind selectively only to the native region II sequence of the conserved major histocompatibility complex class I regulatory element (MHC CRE). Sequences homologous to the H-2RIIBP gene are found in the nuclear receptor family including: retinoic acid receptors (RAR), estrogen receptors (ER), thyroid hormone receptors (TR), (COUP-TF), and other RXR isoformes. This invention also provides for a diagnostic test which determines the nature and progression of a human tumor by measuring the quantity and quality of H-2RIIBP gene dosage or expression.
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