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The pH dependent chemiluminescence emission ratio of the emission at 640 nm to 580 nm of 30 μM 1 and 40 μM carboxy-SNARF-1 in aqueous buffers (pH 5.99–8.01) containing (A) 6% Sapphire II Enhancer or (B) 6% Emerald II Enhancer in an IVIS Spectrum.
