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In vivo fluorescence detection of compound PS 2 and its isomers 3 and 4 accumulation in the colon26 tumors. Representative Images of 1 µmole/kg PS 2 injected i.v. and imaged at 24, 48 and 72 hours post injection (excitation wavelength - 675 nm, emission wavelength −720 nm). B: Data represent the mean fluorescence expressed as total radiant efficiency ±SD of 3 mice/group.
