(center map)
(1) ATM@nucleus - ATM@nucleus -> ATM_Ser 1981_pho@nucleus
(2) MDM2@nucleus - ATM_Ser 1981_pho@nucleus -> MDM2_S395_pho@nucleus
(3) NBS1@nucleus - ATM_Ser 1981_pho@nucleus -> NBS1__pho@nucleus
(4) ATM_Ser 1981_pho@nucleus+NBS1__pho@nucleus -> ATM_Ser 1981_pho:NBS1__pho@nucleus
(5) DP1*:E2F1_Lys_ace:PCAF@nucleus - ATR@nucleus - ATM_Ser 1981_pho@nucleus -> DP1*:E2F1_Lys_ace_Ser31_pho@nucleus+PCAF@nucleus