Lectin

From DictionGloss

A lectin is a plant (usually seed) or animal protein that affects agglutination, precipitation, or other phenomena resembling the action of specific antibody, but that is not an antibody in that it was not evoked by an antigenic stimulus.

A protein (other than an anticarbohydrate antibody) that specifically recognizes and binds to glycans without catalyzing a modification of the glycan.