Abstract
Suspension cultures of total and lymphocyte-enriched peripheral white blood cells were used as a source for the preparation of mRNA for human γ-interferon. The cells were lysed and total RNA was extracted with the phenol method. A poly(A)-rich RNA fraction was isolated by affinity chromatography on oligo(dT)-cellulose and further purified on a preparative sucrose gradient. The RNA preparations were translated by oocytes into (a) protein(s) that showed biological activity in the interferon-assay. On sucrose gradient centrifugation the translatable fractions of the RNA migrated with a sedimentation coefficient of approximately 15 S, a value compatible with the molecular weight of human γ-interferon. The translation product was further characterized by serological cross reactivity with purified γ-interferon in neutralization reactions.
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