Abstract
A cDNA sequence coding for feline interferon has been cloned for the first time by screening a cDNA library constructed using Okayama-Berg vector and mRNA derived from the feline cells (LSA-I) induced by TPA (12-o-tetradecanoylphorbor 13-acetate) for the ability of transient expression to produce feline interferon in COS1 monkey cells. The amino acid sequence, deduced from the nucleotide sequence by comparing it with the sequences of other mammalian IFNs, consists of 171 amino acids with 6 cysteins and an N-glycosylation site at the amino acid position 79, and has about 60% homology to human IFN alpha 1. The interferon was partially purified through Blue Sepharose, and its molecular weight was estimated to be 2.4 x 10(4). The antiviral activity was acid stable, and glycosylation was suggested.
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