fluorescein-conjugated Wisteria floribunda lectin

A fluorescein conjugated to a preparation of lectin(s) extracted from the seeds of Wisteria floribunda (Japanese wisteria), with potential use as a diagnostic agent. Upon administration of fluorescein-conjugated Wisteria floribunda lectin, the lectin moiety preferentially targets and binds to carbohydrate structures containing N-acetylgalactosamine and galactose residues overexpressed on certain tumor cell surfaces. Using white and fluorescent light, tumor cells with increased lectin-binding affinity can be visualized or imaged.