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פותח על ידי קלירמאש פתרונות בע"מ -
Heme‐Linked Properties of Euglena Cytochrome f
Year:
1974
Source of publication :
European Journal of Biochemistry
Authors :
בן חיים, גוזל
;
.
Volume :
46
Co-Authors:
BEN‐HAYYIM, G., Department of Biochemistry, George S. Wise Center for Life Sciences, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, Israel
SCHEJTER, A., Department of Biochemistry, George S. Wise Center for Life Sciences, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, Israel
Facilitators :
From page:
569
To page:
573
(
Total pages:
5
)
Abstract:
Oxidized Euglena cytochrome f has an absorbance band at 695 nm which disappears upon reduction. Various treatments that cause known changes of conformation of cytochrome c appear to have similar effects on cytochromef. Heating cytochrome f results in the gradual disappearance of the 695‐nm band; the thermodynamic parameters for this change of the tertiary structure at 26 °C and ionic strength 0.01 are: ΔF=+2.67 kcal/mole, ΔH=+ 33 kcal/mol and ΔS=+102cal × K−1× mol−1. The pK values obtained by equilibrium titrations of the heme‐linked acid and alkaline ionizations are roughly 2.1 and 9.4. Equilibrium studies of the alkaline pK reveal that more than one hemelinked proton is dissociated in this pH range. The carboxymethylated product of the cyanide complex of oxidized cytochrome f has the same properties as cytochrome c carboxymethylated under the same conditions. The results suggest that a methionine sulfur is involved in iron coordination in oxidized Euglena cytochrome f. Copyright © 1974, Wiley Blackwell. All rights reserved
Note:
Related Files :
Alkylation
Cyanides
Cytochromes
euglena
iron
microorganism
Osmolar Concentration
temperature
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/j.1432-1033.1974.tb03651.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31156
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:00
Scientific Publication
Heme‐Linked Properties of Euglena Cytochrome f
46
BEN‐HAYYIM, G., Department of Biochemistry, George S. Wise Center for Life Sciences, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, Israel
SCHEJTER, A., Department of Biochemistry, George S. Wise Center for Life Sciences, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, Israel
Heme‐Linked Properties of Euglena Cytochrome f
Oxidized Euglena cytochrome f has an absorbance band at 695 nm which disappears upon reduction. Various treatments that cause known changes of conformation of cytochrome c appear to have similar effects on cytochromef. Heating cytochrome f results in the gradual disappearance of the 695‐nm band; the thermodynamic parameters for this change of the tertiary structure at 26 °C and ionic strength 0.01 are: ΔF=+2.67 kcal/mole, ΔH=+ 33 kcal/mol and ΔS=+102cal × K−1× mol−1. The pK values obtained by equilibrium titrations of the heme‐linked acid and alkaline ionizations are roughly 2.1 and 9.4. Equilibrium studies of the alkaline pK reveal that more than one hemelinked proton is dissociated in this pH range. The carboxymethylated product of the cyanide complex of oxidized cytochrome f has the same properties as cytochrome c carboxymethylated under the same conditions. The results suggest that a methionine sulfur is involved in iron coordination in oxidized Euglena cytochrome f. Copyright © 1974, Wiley Blackwell. All rights reserved
Scientific Publication
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