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The ratio (mol:mol) of cellular (A) carbon, (B) nitrogen, and (C) phosphorus quota to N-replete quotas as well as (D) the available dissolved inorganic nitrogen from N-replete growth to N starvation. The decline in N quota to consistent minima in each species (B) and the removal of available DIN (D) indicate N starvation in all cultures. Error bars indicate one standard deviation among triplicate cultures.
