Galanthus Nivalis Lectin (GNL), Fluorescein

Galanthus nivalis lectin, unlike most mannose-specific lectins, is not a metalloprotein and does not require Ca⁺⁺ or Mn⁺⁺ for binding. 

Binding seems to be preferentially directed toward structures containing (α-1,3) mannose residues. Also in contrast to most mannose-binding lectins, GNL will not bind α-linked glucose. Reports indicate that this lectin binds rat and mouse IgM but not IgG. The only protein from human serum reported to bind to this lectin is α2-macroglobulin. GNL binds to many viral glycoproteins. 

Fluorescein labeled Galanthus nivalis 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. The excitation maximum is at 495 nm and the emission maximum is at 515 nm.