PE-VF750 Maleimide is a bifunctional dye designed for thiol reactions, featuring a maleimide group that enables covalent bonding with thiol groups. It possesses an excitation/emission (Ex/Em) profile of 495-566/777 nm. The individual dyes PE and VF within PE-VF750 Maleimide have excitation wavelengths of 495 nm and 566 nm, respectively. The emission wavelength (Em) for PE-VF594 Maleimide is 777 nm.