This is a fluorescent (HiLyte Fluor™ 555)-labeled ß-Amyloid peptide, Abs/Em=551/567 nm. Hilyte Fluor™ 555 labeled Aß (1-40) is more photostable than Cy3-labeled A? (1-40).
HiLyte Fluor™ 555 - Asp - Ala - Glu - Phe - Arg - His - Asp - Ser - Gly - Tyr - Glu - Val - His - His - Gln - Lys - Leu - Val - Phe - Phe - Ala - Glu - Asp - Val - Gly - Ser - Asn - Lys - Gly - Ala - Ile - Ile - Gly - Leu - Met - Val - Gly - Gly - Val - Val - OH