Function
Sialic acid-binding lectin recognizing oligosaccharides containing terminal sialic acid linked via alpha-2,3 bond to penultimate galactose residues (PubMed:3350806). Binds the trisaccharide sequence Neu5Ac-alpha-2,3-Gal-beta-1,4-GlcNAc (PubMed:1985926). Binds fetuin when fully glycosylated but not when the high mannose-type glycans are removed, although the secondary structure is virtually unaffected by deglycosylation of the high mannose-type glycans (PubMed:26003537). The lectin activity may depend on the presence of a single GlcNAc attached to N-90 (PubMed:26003537).