Structure of GFP chromophore confirmed, flanking amino acid residues corrected from Shimomura’s 1979 structure. Still “apoGFP”

CW Cody, DC Prasher, WM Westler, FG Pendergast, WW Ward: Chemical Structure of the hexapeptide chromophore of the Aequorea Green fluorescent protein. Biochemistry 32 (1993) 1212-18.