lectin

https://doi.org/10.1351/goldbook.09831
Saccharide binding protein of non-immune origin.
Note: Some lectins participate in immune response, but they are not products of primary immune response. Lectins also do not display catalytic activity towards their ligands; the binding of carbohydrate is reversible and highly specific.
Source:
PAC, 2018, 90, 1121. (Terminology of bioanalytical methods (IUPAC Recommendations 2018)) on page 1174 [Terms] [Paper]