pGAPZ A, B and C and pGAPZ A, B and C are for Pichia pastoris Expression vector for medium- to high-level, constitutive expression. pGAPZ and pGAPZ are formulated by replacing the methanol-regulated AOX1 with the constitutive glyceraldehyde-3-phosphate dehydrogenase(GAP) promoter in the matrix of the pPICZ vector. Promoter. Although the yield of any protein
constitutively expressed in the Pichia pastoris system depends on the toxicity of the protein to the yeast, constitutive expression under the control of pGAPZ or the pGAPZ vector sometimes produces higher than inducible Express higher yields(1).