Calcitonin, salmon

Calcitonin (salmon) is an hypocalcemic hormone produced by the parafollicular C cells of the thyroid or by the ultimobranchial bodies of nonmammalian vertebrates. Calcitonin (salmon) positively influences bone remodelling and bone mass density due to its inhibiting effect on osteoclast activity. The beneficial effect of salmon calcitonin in the treatment of osteoporotic bone fractures is also due to the promotion of the cartilaginous phase of fracture healing and to pain relief.

Calcitonin, salmon is a 34-residue synthetic peptide with the sequence Cys-Ser-Asn-Leu-Ser-Thr-Cys-Val-Leu-Gly-Lys-Leu-Ser-Gln-Glu-Leu-His-Lys-Leu-Gln-Thr-Tyr-Pro-Arg-Thr-Asn-Thr-Gly-Ser-Gly-Thr-Pro-Cys-Cys. C-terminal amidation removes the terminal carboxylate charge. The sequence contains 4 cysteine residues, providing potential thiol/disulfide chemistry when the thiol is available; contains 2 Lys and 1 Arg residues, contributing cationic character. These sequence-derived properties describe the reagent chemically; no specific receptor, enzyme, pathway, disease association, or biological activity is assigned without product-specific experimental evidence.

• thiol-selective conjugation or immobilization studies
• LC-MS/HPLC analytical method development
• sequence-specific assay controls

Sequence-derived chemical properties support reagent selection and experimental planning but do not establish biological function. Solubility, aggregation, adsorption, conjugation efficiency, and assay performance should be validated under the intended experimental conditions.