The molecular function of this protein is not known. Its expression is specific to the high temperature, unicellular yeast morphology (as opposed to the lower temperature, multicellular mycelium form) [1].

1: Genetic diversity and transcriptional analysis of the bys1 gene from Blastomyces dermatitidis. Bono JL, Jaber B, Fisher MA, Abuodeh RO, O'Leary-Jepson E, Scalarone GM, Smith LH Jr; Mycopathologia 2001;152:113-123. PMID:11811639