identify thermodynamically infeasible loops caused by cofactor specificity

[hariszaf]

Come up with a function to identify cases where more than 1 reactions are doing the same thing using different co-factors. This is a typical case for loopy solutions:

Example:

DR1ORx: nad_c[c] + dr5p[c]  <=> h_c[c] + nadh_c[c] + ru5p-D_c[c]

and

DR1ORy: nadp_c[c] + dr5p[c]  <=> h_c[c] + nadph_c[c] + ru5p-D_c[c]

If the cofactor specificity information is available, the reaction with non-specific cofactor can be removed or turned off.

If not, then..?