S. cerevisiae STO1 (YMR125W) and its A. gossypii syntenic homolog show two possible amino termini. The STO1 mRNA was proposed to be spliced in S. cerevisiae. However, both the spliced and non-spliced versions show homology to the A. gossypii genome, suggesting two alternative variants.
Brachat et al. Genome Biology 2003 4:R45 doi:10.1186/gb-2003-4-7-r45