6. PROPERTIES OF FISH HEMOGLOBINS
245
Johansen (1966) has also studied the air-breathing teleost, Symbrunchus marmorutus. The oxygen equilibrium shows no sigmoid shape,
no Root effect) and a moderate Bohr effect. This remarkable fish utilizes
its gills for air breathing above the surface of marsh water which is
low in oxygen but high in CO,.
4. DIPNOI AND LATIMERIA
Extensive studies of the oxygen transport properties of the bloods
of the lungfishes, Protopterus sp., Neoceratodus sp., and Lepidosiren
have been carried out by Lenfant et al. (1966-1967) and Lenfant and
Johansen ( 1968). Oldham and Riggs (1969) have compared the properties of hemoglobin solutions from Protopterus aethiopicus and from P.
unnectuns. Bonaventura and Riggs (1969) have studied the oxygen
Log oxygen pressure
Fig. 9. The oxygen equilibria of the hemoglobins from the two closely related
lungfish, Protopterus annectans ( open circles) and Protoptertrs aethiopicus (closed
circles) (Oldham and Riggs, 1969). Measurements made in 0.1 M phosphate at
25.5"C.
245
Johansen (1966) has also studied the air-breathing teleost, Symbrunchus marmorutus. The oxygen equilibrium shows no sigmoid shape,
no Root effect) and a moderate Bohr effect. This remarkable fish utilizes
its gills for air breathing above the surface of marsh water which is
low in oxygen but high in CO,.
4. DIPNOI AND LATIMERIA
Extensive studies of the oxygen transport properties of the bloods
of the lungfishes, Protopterus sp., Neoceratodus sp., and Lepidosiren
have been carried out by Lenfant et al. (1966-1967) and Lenfant and
Johansen ( 1968). Oldham and Riggs (1969) have compared the properties of hemoglobin solutions from Protopterus aethiopicus and from P.
unnectuns. Bonaventura and Riggs (1969) have studied the oxygen
Log oxygen pressure
Fig. 9. The oxygen equilibria of the hemoglobins from the two closely related
lungfish, Protopterus annectans ( open circles) and Protoptertrs aethiopicus (closed
circles) (Oldham and Riggs, 1969). Measurements made in 0.1 M phosphate at
25.5"C.