DNA encoding two forms of PDGF A-chain polypeptide, the construction of expression vectors for expressing such DNA in yeast and mammalian cells, and the expression of such DNA in yeast and mammalian cells to produce active PDGF A-chain homodimer and active PDGF A-chain/B-chain heterodimer are disclosed.

 
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< Multi-gene expression constructs containing modified inteins

< Plant methionine synthase gene and methods for increasing the methionine content of the seeds of plants

> Methods for the production of stably-transformed, fertile wheat employing agrobacterium-mediated transformation and compositions derived therefrom

> Synthetic peptides, conjugation reagents and methods
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