Abstract
We have previously described the expression of a bacterial protein in the egg white of transgenic chickens using a replication-deficient retroviral vector. Here we report the expression of a glycosylated human protein, interferon alpha-2b (hIFN), in the egg white of transgenic hens. The hIFN secreted into the egg white was biologically active as determined by a viral inhibition assay. Purification and carbohydrate analysis of the hIFN expressed in egg white revealed that two of the six major glycosylated hIFN species match the naturally occurring human hIFN glycovariants. These results support the potential of the hen as a bioreactor for the production of commercially valuable, biologically active, and glycosylated proteins in egg white.
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