Ensemble

(top) and cartoon (bottom) representations of S64 (left) and S67 (right). The N and C termini are labeled in both the ensemble (top) and cartoon (bottom) representations of the structures of S64 (left) and S67 (right). The three disulfide bonds in the cartoon representations are also labeled. The ensembles represents the 20 structures with the lowest total energy out of 100 calculated structures. The cartoon representations show the lowest energy structure from each ensemble. Note that in the cartoon representation for S64 the third disulfide bond connects to the β sheet (red), not the strand (teal) in front of it.