Chromophores of the green fluorescent protein studied in the gas phase L. H. Andersen, A. Lapierre, S. B. Nielsen, I. B. Nielsen, S. U. Pedersen, U. V. Pedersen and S. Tomita Eur. Phys. J. D, 20 3 (2002) 597-600 Published online: 13 September 2002 DOI: 10.1140/epjd/e2002-00141-0