摘要
Lead (Ⅱ)-binding properties of rabbit liver thionein 2 (apo-MT2) have been studied.Two kinds of complexes. Pb7-MT and Ph7-MT', are observed upon the binding of Ph2+ to apo-MTat different PH. From their characteristic peaks in UV and CD spectra. it is deduced that Ph2+ inPh7-MT is coordinated by four sulfhydryl groups in Td microsymmetry, while multiplecoordination types including two-coordination maybe present in Ph7-MT'
Lead (Ⅱ)-binding properties of rabbit liver thionein 2 (apo-MT2) have been studied.Two kinds of complexes. Pb7-MT and Ph7-MT', are observed upon the binding of Ph2+ to apo-MTat different PH. From their characteristic peaks in UV and CD spectra. it is deduced that Ph2+ inPh7-MT is coordinated by four sulfhydryl groups in Td microsymmetry, while multiplecoordination types including two-coordination maybe present in Ph7-MT'
