represent replicate metabolites as attributes rather than nodes

[tcameronwaller]

[tcameronwaller]

Alternatively, I could give special size, shape, and color to nodes for replicate metabolites. I could also give shorter length to their links. It might be consistent and convenient to continue to represent these replicate metabolites as nodes. They are nodes, after all. Also, if they have links (and if these links are long enough) then it might be clear whether they're reactants or products.