Abstract As demonstrated by August Krogh et al. a century ago, the oxygen‐binding reaction
of vertebrate haemoglobin is cooperative (described by sigmoid O2 equilibrium curves) and …

The Bohr effect, ie the pH dependence of the oxygen affinity of haemoglobins (Hbs) from a
variety of vertebrates, and its modulation by temperature and other heterotropic effectors has …

Evolution has adopted different strategies to solve the problem of transporting oxygen to
respiring tissues, according to needs dictated by the environment. A thermodynamic …

Air-breathing fishes represent interesting organisms in terms of understanding the
physiological changes associated with the terrestrialization of vertebrates, and, further, are …

Considering the variety of species that depend on hemoglobin for oxygen transport, these
molecules must execute their primary function under extreme environmental conditions …

The functional properties of the single haemoglobin (Hb) of Emperor penguin (Aptenodytes
forsteri) have been investigated at different temperatures as a function of proton and organic …

The oxygenation enthalpy of the heme groups of hemoglobin (Hb) is inherently exothermic,
resulting in decreased Hb-O 2 affinity with rising temperature. However, oxygenation is …

Haemoglobins from mammals of sub-Arctic and Arctic species, as well as fetal human Hb,
are all characterized by a significantly lower Δ H of oxygenation compared with the majority …

During winter hibernation, brown bears (Ursus arctos) reduce basal O2 consumption rate
to∼ 25% compared with the active state, while body temperature decreases moderately …

The oxygen binding of whole blood from humans and two arctic mammals, reindeer and
muskox, has been studied as a function of carbon dioxide and temperature. All bloods …