BOP-JF549 is a fluorescent dual alpha9beta1/alpha4beta1 integrin inhibitor. Comprises BOP conjugated to Janelia Fluor 549. Fluorogenic: fluoresces only once bound to integrins, enabling hassle-free no-wash experiments. Bright and photostable, enabling live cell tracking of integrin receptors over long time-course experiments. Excitation maximum = 549 nm; emission maximum = 571 nm.