EXPRESSION SYSTEMS FOR AID WITH VETERS CONTAINING A GAPDH PROMOTOR AND SURFACE SYNTHESIS OF HEPATITITIS B

摘要

Yeast cells containing DNA plasmids having foreign DNA, wherein foreign DNA is expressed, are described. For example, DNA coding for hepatitis B and its virus surface antigen (HBsAg) is ligated to a yeast plasmid to yield a product that is used to transform yeast cells. the plasmids of this invention have PyK promoters, and are capable of replicating in either a yeast cell or a bacterial cell.