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In this chapter, we describe methods to heterologously express G protein-coupled receptors (G
PCR
s) in the fission yeast
Schizosaccharomyces (Sz.) pombe
. GPCRs regulate a diverse range of biological processes in all eukaryotic cells, including plants, insects, humans, and yeast. The high degree of conservation between GPCRs from different organisms has facilitated the development of a large number of model systems to enable study of this pharmaceutically important family of cell-surface receptors. Of the many model systems available for investigating GPCRs, yeast have proven to be one of the more attractive. Yeasts’ amenability to both genetic and biochemical manipulation, a reduced number of endogenous GPCRs and their relative low culturing costs has facilitated their use in many high-throughput drug screens. Given the high number of detailed methods relating to the expression of GPCRs within budding yeast, we have focused our attention on the use of fission yeast as a model system. We describe the methods used and provide examples from our own experiences of expressing a number of human GPCRs in
Sz. pombe
cells.
