In order to target and image MMP-2 activity using optical imaging, we developed a panel of new MMP-2 probes based on Cy5 and QSY21 as fluorophore/quencher FRET partners, separated by various MMP-2 specific peptide substrates. We compared these probes for their specificity against other MMPs, their rate of activation by MMP-2 and their initial quenching.
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Lebel et al. (2012) studied this question.
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