Human transforming growth factor-β complementary DNA sequence and expression in normal and transformed cells

Abstract
The partial amino acid sequence of purified human transforming growth factor-.beta. (TGF-.beta.) was used to identify a series of c[complementary]DNA clones encoding the protein. The cDNA sequence indicates that the 112 amino acid monomeric form of the natural TGF-.beta. homodimer is derived proteolytically from a much longer precursor polypeptide which may be secreted. TGF-.beta. mRNA is synthesized in various normal and transformed cells.

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