Fig. 3.
Probability distributions of direct (kdep; A) and total (Kdep; B) dependency degrees for metabolic enzymes (blue diamonds) and Linux packages (red circles). Power-law fits to direct degree cumulative distribution give −2.08 for metabolic enzymes and −1.91 for Linux packages, and are both consistent with the −2.0 scaling law (solid line in A). Power-law fits to direct degree cumulative distribution give −1.5 for metabolic enzymes and −1.56 for Linux packages, consistent with the mathematically derived −1.5 scaling (solid line in B).