1. AbragamA. (1962) The Principles of Nuclear Magnetism, 2nd ed., Clarendon Press, Oxford, pp. 294?297.
2. ArvidssonK., LandT., Langel�., BartfaiT. and EhrenbergA. (1993) Biochemistry, 32, 7787?7798.
3. Arvidsson, K., Langel, �. and Ehrenberg, A. (1994) Eur. J. Biochem., in press.
4. BarbatoG., IkuraM., KayL.E., PastorR.W. and BaxA. (1992) Biochemistry, 31, 5269?5278.
5. CantorC.R. and SchimmelP.R. (1980) Biophysical Chemistry Part II: Techniques for the Study of Biological Structure and Function, W.H. Freeman, San Francisco, CA, p. 555.