MAD Analyses of Yeast 5-Aminolaevulinic Acid Dehydratase. Their Use in Structure Determination and in Defining the Metal Binding Sites Erskine, P.T. , Duke, E.M.H. , Tickle, I.J. , Senior, N.M. , Warren, M.J. , Cooper, J.B. Acta Crystallogr.,Sect.D 56 pp. 421 (2000)