Before revision:  Here, we apply the disparity filter method based on a high-flux fluctuation analysis to extract the metabolic backbones of two URLanisms, Escherichia coli and Mycoplasma pneumoniae, using computationally predicted fluxes that maximize their growth rate .
After revision:  Here, we apply the disparity filter method based on a high-flux fluctuation analysis to extract the metabolic backbones of two URLanisms, Escherichia coli and Mycoplasma pneumoniae, using computationally predicted fluxes that maximize the growth rate in glucose medium, and we contrast it with the backbone of Mycoplasma pneumoniae, a much URLanism .