... major haemoglobin polymorphs of non-endothermic Atlantic cod to show ATP-induced reversed thermal sensitivity of oxygen binding at their warming southern distribution limit in the North East Atlantic. Allosteric interaction Climate Change Enthalpy Oxygen affinity P50 Phenotypic plasticity...

... the sensitivity of these respiratory proteins to allosteric effector molecules and temperature, and calculated their overall oxygenation enthalpies (Δ H ′). Here we show that the variability in Δ H ′ seen among mole Hbs cannot be attributed to differential Cl – binding at δ8, δ76 and δ77, as the Cl – sensitivity...

... effector, ATP, permitting detailed assessment of overall oxygenation enthalpies (ΔH′) and contributions from oxygenation-linked proton and ATP dissociation. Billfish express multiple isohemoglobins with similar O 2 affinities and pronounced sensitivities to pH and ATP. Compared with the moderate effects...

... oxygen binding enthalpy deep-sea fish hydrothermal vent anguillid zoarcid Thermarces cerberus Symenchelis parasitica Deep-sea hydrothermal vents provide some of the harshest aquatic conditions that metazoans are exposed to in nature. Here, hot (350°C), anoxic waters bearing high levels...

... creatine kinase ATP hydrolysis adenylate kinase pH free Mg 2+ bioenergetics metabolism thermodynamics enthalpy ionic strength Temperature is directly linked to the metabolism and distribution of organisms because it affects reaction rates ( Arrhenius, 1915 ) and thermodynamic equilibria...