0 <-> ACA
ACA <-> 0
0 <-> PKA
PKA <-> 0
0 <-> ERK2
ERK2 <-> 0
0 <-> REGA
REGA <-> 0
0 <-> incAMP
incAMP <-> 0
0 <-> excAMP
excAMP <-> 0
0 <-> CAR1
CAR1 <-> 0