lectins

https://doi.org/10.1351/goldbook.L03495
@G02656@ isolated from plants but recently found also in animals and microorganisms that react specifically with terminal glycosidic residues of other molecules (e.g. cell wall @P04752@); some causing cells to agglutinate (cf. @A00183@).
Source:
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 158 [Terms] [Paper]