Cy5 maleimide

• CAT Number: I043578
• CAS Number: 1437796-65-0
• Molecular Formula: C38H45ClN4O3
• Molecular Weight: 641.24
• Purity: ≥95%
• Synonyms: 6-[(2E)-3,3-dimethyl-2-[(2E,4E)-5-(1,3,3-trimethylindol-1-ium-2-yl)penta-2,4-dienylidene]indol-1-yl]-N-[2-(2,5-dioxopyrrol-1-yl)ethyl]hexanamide;chloride
• IUPAC Name: 6-[(2Z)-3,3-dimethyl-2-[(2E,4E)-5-(1,3,3-trimethylindol-1-ium-2-yl)penta-2,4-dienylidene]indol-1-yl]-N-[2-(2,5-dioxopyrrol-1-yl)ethyl]hexanamide;chloride
• InChI: InChI=1S/C38H44N4O3.ClH/c1-37(2)28-16-11-13-18-30(28)40(5)32(37)20-8-6-9-21-33-38(3,4)29-17-12-14-19-31(29)41(33)26-15-7-10-22-34(43)39-25-27-42-35(44)23-24-36(42)45;/h6,8-9,11-14,16-21,23-24H,7,10,15,22,25-27H2,1-5H3;1H
• InChIKey: IATQCUIJHBSCGA-UHFFFAOYSA-N
• SMILES: CC1(C2=CC=CC=C2[N+](=C1/C=C/C=C/C=C\3/C(C4=CC=CC=C4N3CCCCCC(=O)NCCN5C(=O)C=CC5=O)(C)C)C)C.[Cl-]

Cy5 maleimide（Cat No.:I043578）is a fluorescent dye used in various biochemical and molecular biology applications. It features a maleimide group, which enables covalent bonding to thiol-containing compounds, such as cysteine residues in proteins or peptides. This property makes Cy5 maleimide ideal for labeling biomolecules, enabling their detection and quantification in assays like fluorescence microscopy, flow cytometry, and western blotting. The Cy5 fluorophore emits red fluorescence, providing high sensitivity and minimal background interference, making it a valuable tool in studies of protein-protein interactions, cellular localization, and gene expression analysis.