Griffonia Simplicifolia Lectin I (GSL I) isolectin B4, DyLight 649, 0.5 mg, contains only the B subunits. It is a useful marker for endothelial cells from nonprimates, such as mouse, rat, rabbit, and goat, as well as a marker for non-peptidergic unmyelinated primary afferent neurons. This "B"-rich lectin preferentially agglutinates blood group B cells and is specific for alpha-galactose residues. DyLight 649 GSL I-B4 isolectin is produced by using special conjugation procedures to incorporate DyLight 649 into the affinity-purified lectin. This conjugate has an appropriate number of fluorochromes bound to provide the maximum fluorescence and optimum staining characteristics for this particular lectin. This reagent is supplied essentially free of unconjugated fluorochromes and inactive lectin. Excitation maximum: 646 nm; Emission maximum: 674 nm; Color: Red.