Photoactivatable fluorescent protein
Photoactivatable fluorescent proteins (PAFPs) is a type of fluorescent protein that exhibit fluorescence that can be modified by a light-induced chemical reaction. == History == The first PAFP, Kaede (protein), was isolated from Trachyphyllia geoffroyi in a cDNA library screen designed to identify new fluorescent proteins.
Source: Wikipedia — Photoactivatable fluorescent protein (CC BY-SA 4.0)