Haem conformation of amphibian nytrosylhaemoglobins detected by XANES spectroscopy D. Pozzi, G. Amiconi, A. Arcovito, M. Girasole and A. Congiu Castellano Eur. Phys. J. E, 16 4 (2005) 373-379 Published online: 03 March 2005 DOI: 10.1140/epje/i2004-10092-2