Patent ID: 7625722

Claim:
An immobilized carbohydrate derivative biosensor, comprising: a surface; and a carbohydrate derivative, bound to the surface, which is specifically bindable to at least one biomolecule in a sample, wherein the carbohydrate derivative is a derivative in which the carbohydrate is modified in the reducing end with an O-, N-, C- or S-glycosidically bound aglycon, wherein the aglycon comprises a structure corresponding to a formula —R—X, and wherein the biosensor corresponds to the formula carbohydrate-R—X-protein —NH—CO—CH 2 —CH 2 —S-biosensor surface, where R is an aliphatic group or an aromatic group, and wherein X is at least one member selected from the group consisting of —S—, —NH—CO—, —CO—NH—, —NH—, and —N═N—.