... Mg2+ -binding site per oxygenbinding site Given are the oxygen- binding constants (Kab), the pKab values, and the Mg2+ -binding constants (zab) for the four conformations (ab ¼ tT, rT, tR, rR) The allosteric ... crustaceans, we investigated the oxygen- binding characteristics, their sensitivities to pH, temperature and bivalent cations, and the allosteric mechanisms controlling oxygen binding in Hb from T cancriformis ... about the allosteric control of Hb oxygen binding and its significance for the regulation of internal oxygen conditions in branchiopod crustaceans This lack of knowledge contrasts with the detailed...