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Cloning and expression of recombinant human growth/differentiation factor 5.

The complete amino acid sequence of human Growth/differentiation factor 5 (huGdf5), a new member of the TGF-beta superfamily, has been determined through initial degenerate PCR and subsequent cloning and nucleotide sequencing of genomic DNA and cDNA encoding the precursor and flanking regions. The huGdf5 gene consists of only two coding exons. The protein is highly homologous to its murine equivalent, particularly the mature part which differs only by one amino acid. Expression in HuTK- cells using recombinant vaccinia virus revealed the expected processed dimeric mature protein. Antibodies against huGdf5 were raised in chicken.