A nucleic acid (I): (a) encoding a polypeptide of Seq. ID No. 2 (2055 amino acids, given in the specification); (b) of Seq. ID No. 1 (6995 base pairs, given in the specification); (c) that hybridizes with one of (a) and/or (b) under stringent conditions; or (d) comprising one of (a)-(c) with degeneration of the genetic code appropriate nucleotide sequence, is new. Independent claims are also included for: (1) a polypeptide encoded by the nucleic acid (I); (2) a vector represented in Seq. ID No. 2, that contains at least one copy of (I); (3) a cell transfected with a nucleic acid (I) or with the vector (2); (4) use of a cell (3) to express (I); (5) use of (1) or a part of it for the production of antibodies; (6) an antibody against (1); (7) use of (6) for the detection of (1); (8) use of a probe with nucleic acid sequences which are complementary to the nucleic acid sequence, which encode (1), for the production of a reagent for proving the presence of mRNA; (9) use of a (I) or (1) for the treatment of steroidal hormone dependent illnesses; (10) use of (I), (1), or (6) for the identification of the effectiveness of a (1); (11) a test system for the detection of the effect of (1) in a cell where a reporter gene is expressed in a cell, which if it contains no or only a little of a nuclear receptor, is transfected additionally with a vector, which contains the DNA of the nuclear receptor, the cell in the presence or absence of test substances is cultivated and the change of the expression of the reporter gene is measured; and (12) process for the supply of a pharmaceutical means, comprising that substances are brought into contact with a test system of (11), the effect of the substances on the test system compared with controls measured, a substance which shows a modulation of the activity of the polypeptide identified and mixed with usual formulation materials.
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