Structural and Electronic Properties of the Liver Fluke Heme Cavity by Nuclear Magnetic Resonance and Optical Spectroscopy. Evidence for a Distal Tyrosine Residue in a Normally Functioning Hemoglobin. - Lecomte, Juliette T.J.; Smit, Jan Derk.G.; Winterhalter, Kaspar H.; La Mar, Gerd N. (Biological Magnetic Resonance Bank, 1999)