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  • Title: Nested allostery in scorpion hemocyanin (Pandinus imperator).
    Author: Decker H.
    Journal: Biophys Chem; 1990 Aug 31; 37(1-3):257-63. PubMed ID: 2285787.
    Abstract:
    The oxygen-binding behavior of the 24-meric hemocyanin of the scorpion Pandinus imperator and its dependence on allosteric effectors such as protons can be successfully described by the nesting model; the MWC model is not acceptable. The affinities of the four assumed conformations of the allosteric unit, the 12-meric half-molecule, are not dependent on pH whereas the three allosteric equilibrium constants decrease with decreasing proton concentration. Comparison with the oxygen-binding behavior of the 24-meric tarantula hemocyanin (Eurypelma californicum) reveals that the affinity values for the various conformations seem to be conserved for chelicerata hemocyanin.
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