Fig. 2
From: Advances in metabolic modeling of oleaginous microalgae
Changing biomass composition (Chlorella vulgaris) in response to nitrogen depletion determined over time. While available nitrogen (red line) decreases and optical density (OD, green line) increases over a growth course, the microalga accumulates storage compounds. Accumulation of storage compounds, such as lipids and carbohydrates, leads to a reduction of total protein. Data collected from [32]