14.1 Introduction14.2 Amounts of Microsomal CYP Enzyme Isolated from Yeast Strains Containing Chromosomally Integrated CYP Gene Expression Cassettes are far Higher than Strains Harbouring an Episomal Expression Plasmid Encoding a CYP Gene14.3 Comparison of CYP Enzyme Activity of Yeast-Derived Microsomes (Sacchrosomes) with Commercially Available Microsomes Isolated from Insect and Bacterial Cells14.4 IC50 Values of Known CYP Inhibitors Using Sacchrosomes, Commercial Enzymes and HLMs14.5 Stabilisation of Sacchrosomes through Freeze-drying14.6 ConclusionsReferences