(ins1.spt) Insulin molecule (spacefilling).

(ins2.spt) Insulin (ribbons).

(ins3.spt) Insulin molecule with structural features identified: Helices in blue, sheets in red and turns in yellow.

(ins4.spt) One protein chain with structural features highlighted: helices in blue, sheets in red and turns in yellow. The amino acid sequence that generates these features is: Note to programmers: do this in blue font (Val-Glu-Ala-Leu-Tyr-Leu-Val)-do this in yellow font(Cys-Gly-Glu-Arg-Gly) -do this in red - (Phe-Phe-Tyr-Thr-Pro).