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"Calcitonin is a polypeptide hormone secreted by the
parafollicular cells of the thyroid gland in mammals and by the
ultimobranchial gland of birds and fish.
Miacalcin (calcitonin-salmon) injection, synthetic is a synthetic
polypeptide of 32 amino acids in the same linear sequence that is found
in calcitonin of salmon origin " according to the website http://www.drugs.com/pro/miacalcin.html.
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