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Enthalpies obtained from ITC experiments. (A) The temperature dependence of the experimental enthalpies, ΔHcal, that accompany La3+ binding to P1 and selected P2X peptides. (B) The temperature dependence of the enthalpies of helix–coil transition, Δhα, for the selected peptides. □, P2G; ○, P2A; ⋄, P2N; ▵, P2V; ▿, P2B; 
, P1.
