Abstract
Trojan peptides or cell-penetrating peptides (CPP) are natural or designed peptides identified as cellular membrane-crossing molecules, in particular through their potency to vehiculate various kinds of compounds to the cytoplasm and nucleus of living cells. The indirect methods used so far to detect these peptides in cells led to controversial hypotheses on the mechanism of their cell entry. Therefore, we have developed a MALDI-TOF mass spectrometry-based quantification method to track these peptides inside cells. This new method is presented in this review.
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