(Des-Cys¹,cyclo(Ser²-Asu⁷))-Calcitonin (eel)

Elcatonin, also known as carbocalcitonin, is the aminosuberic acid analog of eel calcitonin. Elcatonin has all the biological properties of the corresponding natural peptide hormone. The substitution of the disulfide bond of natural calcitonins with an ethylene bridge in 1-7 N-terminal position gives elcatonin greater stability and excellent tolerability when used in vivo.