 "Ogataea polymorpha" with its unusual characteristics provides an excellent platform for the gene technological production of proteins, especially of pharmaceuticals like insulin for treatment of diabetes, hepatitis B vaccines or IFNalpha-2a for the treatment of hepatitis C. Derivatives of both CBS4732 and DL-1 are employed in the production of such recombinant compounds.Further yeasts employed for this application are "Pichia pastoris", "Arxula adeninivorans" and "Saccharomyces cerevisiae" and others.Like other yeasts, "O. polymorpha" is a microorganism that can be cultured in large fermenters to high cell densities within a short time.