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Table 2 The variables of the circadian clock model

From: On the architecture of cell regulation networks

x 1

Per m

x 7

PER · P c

x 13

Pdp m

x 19

CLK c

x 2

Tim m

x 8

PER · P n

x 14

Clk m

x 20

CLK · CYC c

x 3

PER c

x 9

TIM n

x 15

VRT c

x 21

CLK · CYC · P c

x 4

TIM c

x 10

PER · TIM n

x 16

VRI n

x 22

CLK · CYC n

x 5

PER · TIM c

x 11

SM c

x 17

PDP c

x 23

CLK · CYC · P n

x 6

PER · TIM f

x 12

VRI m

x 18

PDP n

  
  1. This Drosophila circadian clock model consists of two loops. One contains PER and TIM and the other contains PDP and VRI. They interact through CLK-CYC controlled expression. SM and FBM are two proteins assisting in the first loop.