| Value |
27.3
%
Range: ±2.4 %
|
| Organism |
Bacteria Azotobacter vinelandii |
| Reference |
Orme-Johnson WH. Molecular basis of biological nitrogen fixation. Annu Rev Biophys Biophys Chem. 1985 14: 419-59. p.447 top paragraphPubMed ID3890886
|
| Primary Source |
Rivera-Ortiz JM, Burris RH. Interactions among substrates and inhibitors of nitrogenase. J Bacteriol. 1975 Aug123(2):537-45.PubMed ID1150625
|
| Comments |
"The universal observation that H2 is evolved when N2 is the competing
substrate has been pursued recently to a definitive conclusion. Simpson &
Burris (ref 130) have examined the ratio of H2 evolved to N2 reduced as a
function of pN2 up to 50 atmospheres, approximately 360 times the apparent Km for N2 reduction by the Azotobacter nitrogenase preparation
employed (primary source). They found that 27.3±2.4 percent of the electron flux went
to H2 evolution under conditions where the velocity of N2 reduction is
estimated to be 99.7% of maximal." |
| Entered by |
Uri M |
| ID |
111319 |