respiratory pigment

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Related to respiratory pigments: alveoli

respiratory pigment

n.
Any of various colored conjugated proteins, such as hemoglobin, that occur in living organisms and function in oxygen transfer in cellular respiration.
References in periodicals archive ?
Some Antarctic fishes, the icefishes (Channichtyidae) have even lost their respiratory pigments (Ruud, 1954).
The cooperativity of respiratory pigments is characterized by the Hill coefficient ([n.sub.50]).
This reserve represents the amount of oxygen that remains bound to the respiratory pigment at constant P[o.sub.2], even when pH falls to very low values.