Figure 3. Compositional comparison of SARS-CoV-2 biomass and host maintenance based on human lung cell protein expression. The values on the Y‑axis of both panels are the base 2 logarithms of the ratio of the proportion of each metabolite (amino acid or nucleotide) in the virus biomass divided by its proportion in the host maintenance function. The proportion of each metabolite is its stoichiometric coefficient in the corresponding reaction (virus biomass or host maintenance) in mmol∙gDW-1, divided by the sum of all stoichiometric coefficients in that reaction.