L: GFP-like photoswitchable fluorescent protein A: GFP-like photoswitchable fluorescent protein M: GFP-like photoswitchable fluorescent protein B: GFP-like photoswitchable fluorescent protein R: GFP-like photoswitchable fluorescent protein G: GFP-like photoswitchable fluorescent protein S: GFP-like photoswitchable fluorescent protein H: GFP-like photoswitchable fluorescent protein
This protein consists of 4 protein chains (1-231) and inside each of them there is break between 62 and 66 as chromophore. The biological unit is tetramer.