Compound record
Calcitonin (salmon)
Salmon calcitonin; sCT
Sequence
CSNLSTCVLGKLSQELHKLQTYPRTNTGSGTP-NH2 (disulfide Cys1–Cys7)
CSNLSTCVLGKLSQELHKLQTYPRTNTGSGTP
Length
32
residues
Formula
C145H240N44O48S2
elemental composition
Molecular weight
3,431.85
g/mol · average mass
CAS number
47931-85-1
registry ID
PubChem CID
16129626
PubChem ID
Length counts residues; formula and mass are the stored free-base values from cited sources; CAS and PubChem identify the substance in public registries. More detail: length & peptide bonds, molecular weight
Structure & modifications
N-terminal disulfide ring plus a long amphipathic helix and a C-terminal proline amide.
Notes
Salmon calcitonin is the 32-residue reference calcitonin in many pharmacopeias. Human calcitonin differs at multiple positions and must not share this identity.
- Cys1–Cys7 disulfide — N-terminal ring
- C-terminal prolinamide
- Long amphipathic mid-region supporting helix in membrane mimetics
| Feature | Value |
|---|---|
| Length | 32 |
| Classification | Cyclic (disulfide) |
| CAS / PubChem | 47931-85-1 / 16129626 |
| Related architecture | Pramlintide (amylin analogue) shares a similar N-terminal ring style |
Display notation must include
-NH2and the disulfide pair when reconciling formula with registry data.
Primary-source references
- PubChem CID 16129626 — calcitonin salmon
- Niall H.D. et al. Amino acid sequence of salmon ultimobranchial calcitonin. Proc. Natl. Acad. Sci. USA 1969.