Sambucus Nigra Lectin (SNA, EBL), CY5, 1 mg, isolated from elderberry bark, binds preferentially to sialic acid attached to terminal galactose in alpha-2,6 and, to a lesser degree, alpha-2,3 linkage. Binding is also inhibited to some extent by lactose or galactose. This lectin does not appear to bind sialic acid linked to N-acetylgalactosamine. SNA has been reported to inhibit cell-free protein synthesis. Cy5-labeled Sambucus nigra lectin has an appropriate number of fluorochromes bound to provide the optimum staining characteristics for this lectin. This conjugate is supplied essentially free of unconjugated fluorochromes. Excitation: 649 nm; Emission: 670 nm; Color: Far Red.