In J. Biol. Chem (1988 (263) 7713-7716) Mary Ann Perozzo et al describe the
cristallization of GFP in two morphologies suitable for X ray diffraction
analysis. This report concludes with " A single cristal X ray diffraction
structure analysis is in progress." But since this report nothing has been
published. If anyone has information about this problem, please give it to
me. Thank you.