 A single signal peptide consists of a 1 to 3 basic amino acid terminus, a hydrophobic region of 15 residues, a proline (Pro) or glycine (Gly) in the hydrophobic core region, a serine (Ser) or threonine (Thr) amino acid near the carboxyl terminal end of the hydrophobic core, and an alanine (Ala) or glycine (Gly) at the cleavage site.A mature TSST-1 protein has a coding sequence of 585 base pairs.The entire nucleotide sequence was determined by Blomster-Hautamaazg, et al., as well as by other researchers with other experiments.