linaclotide

H–Cys1–Cys2–Glu3–Tyr4–Cys5–Cys6–Asn7–Pro8–Ala9–Cys10–Thr11–Gly12–Cys13–Tyr14–OH Between Cys1 and Cys6, between Cys2 and Cys10, and between Cys5 and Cys13