A highly sensitive near-infrared fluorescent probe for cysteine and homocysteine in living cells†
Abstract
A near-infrared fluorescent probe (Cy–O–CHO) for the detection of endogenous Cys/Hcy in living cells was designed and synthesized. Cy–O–CHO exhibited high sensitivity and good selectivity to Cys/Hcy under physiological conditions with a detection limit of 7.9 nM for Cys.