Systems Analysis of Bioenergetics and Growth of the Extreme Halophile Halobacterium salinarum
Figure 4
Summary of nutrient uptake and incorporation rates under aerobic conditions.
The blue curves indicate the net amount of each amino acid that has been consumed (positive) or produced (negative) as a function of time. The red curves, on the other hand, show the total amount of each that has been incoporated into the biomass, whether integrated into proteins or as free metabolites. Clearly, for most of the supplied amino acids, the rate at which they are taken up from the medium far exceeds the rate at which they are directly incorporated. This implies that the pertinent amino acids are, in addition, significantly catabolized for energy, and/or are used to synthesize the other biomass constituents that are not supplied.