Figure 1.

The Drosophila melanogaster circadian model. per-related components are labeled in blue, tim in red, vri in green, pdp in purple, and clk in black. The solid lined connectors represent complex cellular reactions, while the dashed connectors represent linear transport. Dotted lines denote relative degradation in which thicker lines imply greater degradation rates. The shaded box represents the nucleus; connectors that end at the far left or right of the figure are assumed to wrap around to the opposing side. For clarity, we assign numeric labels on these transport processes.