anti-Actin, alpha 2, Smooth Muscle, Aorta (ACTA2) (N-Term) antibody (HiLyte Fluor 555): Orange fluorescence. Excitation/Emission wavelength= 553 nm/568 nm. The fluorescence of HiLyte Fluor(TM) 555 is brighter and more resistant to photobleaching compared to other orange fluorophores, such as TAMRA.