Tissue
ARA290
Quick profile: 11-amino-acid peptide, purity ≥99%, certificate of analysis per batch on request.
| Purity | ≥99% by HPLC |
|---|---|
| CAS number | 1208243-50-8 |
| Molecular weight | 1257.4 g/mol |
| Molecular formula | C51H84N16O21 |
| Material class | 11-amino-acid peptide |
| Appearance | White to off-white lyophilized powder |
| Available sizes | 10mg |
| Documentation | Certificate of analysis on request |

ARA290 (cibinetide) is an 11-residue peptide derived from the helix-B surface region of erythropoietin, supplied for receptor-focused research and analytical characterisation.
Its formula, C51H84N16O21, contains no sulfur, so MS identity comes down to a direct comparison of the observed mass with the theoretical 1257.4 g/mol, with no disulfide or oxidation state to account for. On reversed-phase HPLC, this mid-length, comparatively hydrophilic peptide shows moderate retention and a well-resolved main peak.
Purity (≥99% by specification), CAS number 1208243-50-8 and molecular weight together define the specification; the certificate of analysis for each batch is available for the product on request.