A purple acid phosphatase from sweet potato contains an antiferromagnetically coupled binuclear Fe-Mn center. - Schenk,G..; Boutchard,C..L..; Carrington,L..E..; Noble,C..J..; Moubaraki,B..; Murray,K..S..; de Jersey,J..; Hanson,G..R..; Hamilton,S.. (J. Biol. Chem., 2001)