pYES2/NT and pYES2/CT are S. cerevisiae expression vectors derived from the parental pYES2 vector. Both vectors offer the URA3 gene for selection in yeast. pYES2/NT features an N-terminal Xpress™ epitope for detection with Invitrogen's Anti-Xpress™ Antibody and a polyhistidine (6xHis) tag for purification with nickel-chelating resin. pYES2/CT contains a C-terminal V5 epitope for detection and a polyhistidine (6xHis) tag for purification.