Lectin GS-II, isolated from the seeds of the tropical African legume Griffonia simplicifolia is a 113,000-dalton compoased of identical subunits. Each subunit contains a single binding site specific for terminal non-reducing a- or ß-linked N-acetyl-D-glucoasemine. Unlike many other lectins, GS-II does not react with any specific blood group. The far red-fluorescent lectin GS-II Alexa Fluor™ 647 conjugate can be used in fluorescence microscopy or flow cytometry.

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