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(A) Absorbance spectra of near-infrared (NIR) imaging probes, consisting of a NIR fluorophore conjugated to avidin, without SDS (dashed line) and with SDS (solid line). (B) Emission spectra of NIR imaging probes without (dashed line) and with (solid line) SDS (McCann et al., 2011). Reproduced with permission. Copyright 2011 American Chemical Society.
