Steady-State Model (IMAGE) Technical University of Munich (TUM) Caption Substrates S1 and S2 are absorbed by incorporating proteins C1 and C2. This generates the nutrition flow (1). Ribosomes synthesize proteins (2a) from precursors (2a) extracted from the nutrient. Each of the white numbered circles stands for a biochemical process leading to the adaptation of the cell. Credit Schink and Gerland / TUM Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.