Recombinant methods of making gamma interferon compositions

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Recombinant dna technique included in method of making a...

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530351, 424 855, C12N 1523, C12N 121

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055958885

ABSTRACT:
Provided are methods for the production of mixtures of interferon (IFN)-.gamma. polypeptides. The methods employ a single species of IFN-.sub..gamma. DNA having codons for Met-Gln and for residues 2-143 of the mature human IFN-.sub..gamma. amino acid sequence. Expression of such DNA in a suitable recombinant host cell affords a mixture of polypeptides having N-terminal Met-Gln, H-Gln, or H-pyroglutamate residues and C-termini at Arg.sup.139, Ser.sup.142, or Gln.sup.143 of the mature IFN-.sub..gamma. sequence. The polypeptides so produced exhibit the antiviral and antiproliferative activities as well as the acid lability characteristic of native human IFN-.sub..gamma..

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