Fig. 1. The versatility of albumin artificial metalloenzymes allows for its usage in areas such as drug therapy and diagnostics.

The goal of this study was to develop a leading example of an ArM-based enzyme biosensor, which can be used to monitor the ethylene produced in fruits and leaves via turn-on fluorescence. The strategy relies on the AEP probe, which uses FRET-based detection of ethylene gas through ruthenium-catalyzed, cross metathesis.