The gene structure (number and length of exons) is similar among family members. This gene encodes one of two phenol sulfotransferases with thermostable enzyme activity. Two alternatively spliced variants that encode the same protein have been described.[7]
^Dooley TP, Huang Z (Dec 1996). "Genomic organization and DNA sequences of two human phenol sulfotransferase genes (STP1 and STP2) on the short arm of chromosome 16". Biochem Biophys Res Commun. 228 (1): 134–40. doi:10.1006/bbrc.1996.1628. PMID8912648.