Crystal structure of GFP Fig 6 Crystal structure of GFP. The chromo phore is shown in green and is located in the center of the B-barrel. Coordinates obtained from the PDB (IGFL Fan Yang, Larry g. Moss et al Nature biotechnology 1996, 14, 1246Fan Yang, Larry G. Moss et.al Nature biotechnology 1996, 14, 1246 Crystal structure of GFP