Fluorogenic ''lock and key'' (IMAGE) University of Montreal Caption “Our idea was to label sugar molecules with a chromophore, a chemical that gives a molecule its colour,” explained Cecioni. “The chromophore is actually fluorogenic, which means that it can become fluorescent if the binding of sugar with the lectin is efficiently captured.” Credit Cecioni Lab Usage Restrictions Editorial use. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.