The AFC fluorophore has a greater emission stokes shift thus displaying less interference from autofluorescence in cellular extract assays. Excitation: 400 nm; Emission: 505 nm. Product Specification Kit/Set Contains: 1 mg each of Ac-DEVD-AFC, Ac-YVAD-AFC, Ac-IETD-AFC; 0.1 mg each of Ac-DEVD-CHO, Ac-YVAD-CHO, Ac-IETD-CHO; 1 mg 7-amino-4-trifluoromethyl coumarin. Shipping: SHIPPED ON BLUE ICE Long Term Storage: -20°C