[Expression, purification and antiviral activities of a new recombinant human interferon-lambda2].

Objective: To express recombinant human interferon lambda2 in E.coli and to study its antiviral activities.

Methods: According to preferred codons used in E.

[Cloning, expression of human keratinocyte growth factor and its purification and identification].

To clone KGF-2 gene, get hKGF-2 protein and detemine its activity. The cNDA of human KGF-2 was isolated from fetal lung by RT-PCR and cloned into pBV220 plasmid. The recombinant pBV220-hKGF-2 plasmid was transformed into E.