PA-GFP (Photoactivatable Green Fluorescent Protein)

PA-GFP (Photoactivatable Green Fluorescent Protein) is a specialized form of green fluorescent protein that can be turned on, or activated, by exposure to specific light wavelengths. In its inactive state, it appears non-fluorescent, but when illuminated with activating light, it undergoes a chemical change that causes it to emit bright green fluorescence. This property allows scientists to precisely control when and where the protein fluoresces within cells or tissues, facilitating detailed studies of cellular processes, protein movement, and molecular interactions with high spatial and temporal resolution.