0 -> AP1
AP1 -> 0
0 -> pRB
E2F + pRB -> pRBc1
pRBc1 -> E2F + pRB
pRB -> pRBp
pRBp -> pRB
pRB -> 0
pRBp -> pRBpp
pRBpp -> pRBp
E2F + pRBp -> pRBc2
pRBc2 -> E2F + pRBp
pRBp -> 0
pRBpp -> 0
0 -> E2F
E2F -> E2Fp
E2Fp -> E2F
E2F -> 0
E2Fp -> 0
0 -> Cd
0 -> Cd
Cd -> Mdi
Mdi -> Cd
Cd -> 0
Cd -> 0
Md -> Mdi
Mdi -> Md
Md + p27 -> Mdp27
Mdp27 -> Md + p27
0 -> Ce
Ce -> Mei
Mei -> Ce
Ce -> 0
Ce -> 0
Me -> Mei
Mei -> Me
Me + p27 -> Mep27
Mep27 -> Me + p27
0 -> Skp2
Skp2 -> 0
Skp2 -> 0
0 -> Pei
Pe -> Pei
Pei -> Pe
Pei -> 0
Pe -> 0
0 -> Ca
Ca -> Mai
Mai -> Ca
Ca -> 0
Ca -> 0
Ma -> Mai
Mai -> Ma
Ma + p27 -> Map27
Map27 -> Ma + p27
0 -> p27
0 -> p27
Mb + p27 -> Mbp27
Mbp27 -> Mb + p27
p27 -> p27p
p27p -> p27
p27 -> 0
p27p -> 0
p27p -> 0
Cdh1a -> Cdh1i
Cdh1i -> Cdh1a
Cdh1i -> 0
Cdh1a -> 0
0 -> Cdh1a
Pa -> Pai
Pai -> Pa
Pai -> 0
0 -> Pai
Pa -> 0
0 -> Cb
Cb -> Mbi
Mbi -> Cb
Cb -> 0
Cb -> 0
Cb -> 0
Mb -> Mbi
Mbi -> Mb
0 -> Cdc20i
Cdc20i -> Cdc20a
Cdc20a -> Cdc20i
Cdc20i -> 0
Cdc20a -> 0
0 -> Pbi
Pb -> Pbi
Pbi -> Pb
Pbi -> 0
Pb -> 0
0 -> Wee1
0 -> Wee1
Wee1 -> Wee1p
Wee1p -> Wee1
Wee1 -> 0
Wee1p -> 0
0 -> Cdc45
Cdc45 -> 0
Cdc45 -> Pol
Pol -> Cdc45
0 -> Primer
Primer -> 0
Primer -> ATR
ATR -> Primer
0 -> Chk1
Chk1 -> 0