Biotin-PEG3-aldehyde

• CAT Number: I045943
• CAS Number: 889443-90-7
• Molecular Formula: C26H38N4O7S
• Molecular Weight: 550.67
• Purity: ≥95%
• Synonyms: N-[2-[2-[2-[2-[5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]ethoxy]ethoxy]ethoxy]ethyl]-4-formylbenzamide
• InChI: InChI=1S/C26H38N4O7S/c31-17-19-5-7-20(8-6-19)25(33)28-10-12-36-14-16-37-15-13-35-11-9-27-23(32)4-2-1-3-22-24-21(18-38-22)29-26(34)30-24/h5-8,17,21-22,24H,1-4,9-16,18H2,(H,27,32)(H,28,33)(H2,29,30,34)/t21-,22-,24-/m0/s1
• InChIKey: WATYQHRJBUTCIM-FIXSFTCYSA-N
• SMILES: C1[C@H]2[C@@H]([C@@H](S1)CCCCC(=O)NCCOCCOCCOCCNC(=O)C3=CC=C(C=C3)C=O)NC(=O)N2

Biotin-PEG3-aldehyde（Cat No.:I045943）is a biotinylated linker designed for site-specific labeling and bioconjugation. The biotin moiety provides strong and selective binding to avidin or streptavidin systems, supporting applications in detection, purification, and assay development. The PEG3 spacer improves water solubility, reduces steric hindrance, and provides flexibility, ensuring efficient conjugation in complex biological systems. The reactive aldehyde group enables chemoselective ligation with aminooxy or hydrazide functionalities, forming stable oxime or hydrazone linkages. This reagent is widely applied in proteomics, diagnostic probe development, targeted delivery, and chemical biology research requiring precision labeling.