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Titolo:
EFFECT OF HEMOGLOBIN OXYGENATION ON BOHR PROTON RELEASE AND CO2 EXCRETION IN THE RAINBOW-TROUT
Autore:
BRAUNER CJ; GILMOUR KM; PERRY SF;
Indirizzi:
AARHUS UNIV,DEPT ZOOPHYSIOL,BLDG 131 DK-8000 AARHUS C DENMARK UNIV GLASGOW,DIV ENVIRONM & EVOLUT BIOL GLASGOW G12 8QQ LANARK SCOTLAND UNIV OTTAWA,DEPT BIOL OTTAWA ON K1N 6N5 CANADA
Titolo Testata:
Respiration physiology
fascicolo: 1, volume: 106, anno: 1996,
pagine: 65 - 70
SICI:
0034-5687(1996)106:1<65:EOHOOB>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBON-DIOXIDE EXCRETION; RED-BLOOD-CELLS; FISH HEMOGLOBINS; TENCH HEMOGLOBIN; EQUILIBRIA; INVITRO; PH;
Keywords:
BLOOD, BOHR-HALDANE EFFECT, CO2 EXCRETION; CARBON DIOXIDE, EXCRETION, FISH; FISH, RAINBOW TROUT (ONCORHYNCHUS MYKISS); HEMOGLOBIN, SATURATION, BOHR PROTON RELEASE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
C.J. Brauner et al., "EFFECT OF HEMOGLOBIN OXYGENATION ON BOHR PROTON RELEASE AND CO2 EXCRETION IN THE RAINBOW-TROUT", Respiration physiology, 106(1), 1996, pp. 65-70

Abstract

CO:! excretion in trout is dependent upon the Haldane effect and the release of protons (Bohr protons) from haemoglobin during oxygenation of the blood. Oxygenation of whole blood from trout in vitro, resultedin a non-linear release of Bohr protons over the haemoglobin-oxygen (Hb-O-2) equilibrium curve, where the majority of Bohr protons were released between 60 and 100% of Hb oxygen saturation (SO2) Oxygenation ofthe blood over this region of the Hb-O-2 equilibrium curve elevated the HCO3- flux rate across the HCO3-/Cl- exchanger on the red cell membrane by about 30% during CO2 excretion in vitro. Oxygenation of the Hbbetween 0 and 60% S-O2 did not elevate CO2 excretion rate in vitro. These data indicate that utilization of different regions of the Hb-O-2dissociation curve in trout in vivo will influence CO2 excretion by altering the rate of HCO3- entry into the red cell during gill blood transit.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 11:26:57