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Absorption spectra of anti-GD2, Cy-NHS and Cy7-GD2. (A) Single maximum absorption peak of anti-GD2 at 280 nm. (B) Single maximum absorption peak of Cy-NHS at 750 nm. (C) Double absorption peaks of Cy7-GD2 at 280 and 750 nm. GD2, ganglioside; Cy7, CyDye mono-reactive NHS esters.
