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. 1993 Sep 1;294(Pt 2):589–593. doi: 10.1042/bj2940589

cDNA cloning and characterization of the protein encoded by RD, a gene located in the class III region of the human major histocompatibility complex.

J Cheng 1, K J Macon 1, J E Volanakis 1
PMCID: PMC1134496  PMID: 8373374

Abstract

The RD gene, initially defined in the mouse, has been mapped between the Bf and C4A genes in the human major histocompatibility complex class III region. Using the mouse cDNA as a probe, we isolated and sequenced human RD cDNA clones. The composite nucleotide sequence consisted of 1301 nucleotides, excluding a poly(A) tail at the 3' end. It contained a single open reading frame encoding a polypeptide of 380 amino acid residues with a calculated molecular mass of 42274 Da. The most striking structural feature of the deduced amino acid sequence is a region consisting entirely of 24 tandem repeats of an Arg-Asp (or Glu) dipeptide. The human RD cDNA was expressed in Escherichia coli as a fusion protein with glutathione S-transferase and used to produce antisera in rabbits. Western blot analysis and immunoprecipitation of lysates of biosynthetically labelled HeLa cells indicated that RD is a 44 kDa nuclear protein.

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Selected References

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