- Synthesis of monohydroxylated inositolphosphorylceramide (IPC-C) in Saccharomyces cerevisiae requires Scs7p, a protein with both a cytochrome b5-like domain and a hydroxylase/desaturase domain. Dunn, T.M., Haak, D., Monaghan, E., Beeler, T.J. Yeast (1998)