Biomass synthesis reaction in Yeast-GEM appears not to sum to 1000

[wuke0714]

In the Yeast-GEM, the sum of the products of the relative molecular masses and stoichiometric coefficients of biomass synthesis components should ideally be 1000. However, my calculations suggest that this sum is approximately 965. If possible, could you help verify this?

[edkerk]

The sumBioMass function in /code/otherChanges returns the following summation:

>> [X,P,C,R,D,L,I,F] = sumBioMass(model);
P -> 0.46 g/gDW
C -> 0.3807 g/gDW
R -> 0.061 g/gDW
D -> 0.0037021 g/gDW
L -> 0.087299 g/gDW
I -> 0.0024815 g/gDW
F -> 0.0048478 g/gDW
X -> 1 gDW/gDW

This makes uses of the molecular weights in these two documents: #1, #2

Pay attention that the lipid component is calculated from the lipid backbone pseudoreaction, where the coefficients are already in g/gDCWh.