BibTex format
@article{Mackie:2013:10.1371/journal.pone.0075210,
author = {Mackie, A and Keseler, IM and Nolan, L and Karp, PD and Paulsen, IT},
doi = {10.1371/journal.pone.0075210},
journal = {PLoS ONE},
pages = {e75210--e75210},
title = {Dead End Metabolites - Defining the Known Unknowns of the E. coli Metabolic Network},
url = {http://dx.doi.org/10.1371/journal.pone.0075210},
volume = {8},
year = {2013}
}