The function geneDel returns the fluxes which are effected by a
particular combination of genes.
geneDel(model, genes, checkId = FALSE)An object of class modelorg.
A vector of character strings of gene id's used in model, or an
integer vector with indices to gene id's in allGenes(model).
Boolean. If set to TRUE, argument genes will be checked wether
it fits to model (e.g. are all genes existing). If set to
FALSE, genes must contain indices of gene id's in
model, e.g. in calls from optimizer.
An numeric vector of pointers to reaction id's in model or NULL,
if no fluxes are effected by the gene deletion.
The function geneDel checks for a set of gene id's in gene
on which fluxes a deletion of this set of genes has an effect.
Edwards, J. S., Ibarra, R. U. and Palsson, B. <U+00D8>. (2001) In silico predictions of Escherichia coli metabolic capabilities are consistent with experimental data. Nat Biotechnol 19, 125--130.