<p>This domain is found in squalene epoxidase (SE) and related proteins which are found in taxonomically diverse groups of eukaryotes and also in bacteria. SE was first cloned from <taxon tax_id="4932">Saccharomyces cerevisiae</taxon> (Baker's yeast) where it was named ERG1. It contains a putative FAD binding site and is a key enzyme in the sterol biosynthetic pathway [<cite idref="PUB00020824"/>]. Putative transmembrane regions are found to the protein's C terminus. </p> Squalene epoxidase