I am trying to find values for the fractionation of 13c/12C during CO2
release via decarboxylation in the tricarboxylic acid cycle (in plant
mitochondria), namely by the enzymes isocitrate dehydrogenase and
2-oxoglutarate dehydrogenase. I have found a value for the first
-1.1 per mil (O'Leary and Limburg, 1977) for isocitrate dehydrogenase
but despite a thorough cd rom search, I have not been able to find a
reference/value for the latter.
If anybody knows any references/values for either I would be
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