AATOM(TM) 655 maleimide

Product key features: Ex/Em: 661/679 nm Extinction coefficient: 125,000 cm^(-1)M^(-1) Reactive group: maleimide Versatile Conjugation: Efficiently labels thiol groups on proteins, antibodies, and oligonucleotides with covalent thioether bonds High Quantum Yield & Stability: Provides bright fluorescence with high photostability and thermal resilience Ozone-Resistant: Enhanced resistance to atmospheric ozone degradation compared to cyanine dyes. Product description: AATOM(TM) 655 is a far-red fluorescent dye characterized by its strong absorption, high photo and thermal stability, excellent ozone resistance, and excellent water solubility. The dye exhibits moderate hydrophilicity and is optimally excited within the 640-660 nm wavelength range, which aligns with the 647 nm line of Krypton-Ion lasers and the 650 nm line of diode lasers. As a zwitterionic compound, AATOM(TM) 655 remains electrically neutral when conjugated to biomolecules or other substrates. Its strong electron-accepting properties result in efficient fluorescence quenching by electron donors such as guanine and tryptophan. These properties render AATOM(TM) 655 highly suitable for precise applications including single-molecule detection and super-resolution microscopy techniques like PALM, dSTORM, and STED. Furthermore, AATOM(TM) 655 is compatible with flow cytometry (FACS), fluorescence in situ hybridization (FISH), and a variety of other biological assays, making it a versatile tool in advanced fluorescence-based research. The maleimide derivative of AATOM(TM) 655 is widely used for labeling biomolecules with free thiol (SH) groups, including antibodies, proteins, thiol-modified oligonucleotides, and low molecular weight ligands. Maleimides react readily with sulfhydryl groups, forming stable thio-ether bonds between the dye and the biomolecule, facilitating robust and reliable labeling for diverse experimental applications.