- The Candida albicans CHS4 gene complements a Saccharomyces cerevisiae skt5/chs4 mutation and is involved in chitin biosynthesis. Sudoh, M., Tatsuno, K., Ono, N., Ohta, A., Chibana, H., YamadaOkabe, H., Arisawa, M. Microbiology (Reading, Engl.) (1999)