| Cluster | Cluster function | Scorea | Nodes | Edges | Gene symbol |
| I | Apoptotic/macromolecular metabolic process | 4.08 | 25 | 49 | ARRB2, ARRB1, CUL4A, HDAC1, RPS3, ERCC6, GNAS, UBE3A, NBN, CHEK2, BRCA1, ESR1, ARR3, AR, HDAC2, NEDD4, UBB, MSH6, NR3C1, UBC, PDE4D, SUMO1, HIF1A, TUBB2A, ITCH |
| II | Synaptic transmission/intracellular and second messenger signaling cascade | 2.67 | 13 | 16 | KCNJ9, DRD2, ADRB2, DRD4, NOS3, MAP1A, GCDH, TTN, HTR2A, PSEN1, ACTN1, KCNJ3, GNA11 |
| III | Behavioral response to nicotine | 3.00 | 3 | 3 | UBQLN1, CHRNB4, CHRNA3 |
| IV | Response to abiotic stimulus/cellular metabolic process | 3.05 | 22 | 32 | BRCA2, GAPDH, H2AFX, SPTAN1, PRMT1, PRKG1, MGMT, NCL, HECW2, USP11, ATR, LMNA, GRIN2A, CDK5, TP53, GRIN2B, KPNB1, XRCC6, MRE11A, TCEAL1, PLCG1, PDCD5 |
| V | Cellular response to DNA damage stimulus/DNA metabolic process | 3.29 | 15 | 23 | RPA2, RPA3, CCNH, HSPA4, ERCC3, XRCC1, RPA1, GTF2H1, MLH1, PCNA, MYC, XPC, ATM, CDK2, SUMO2 |
| VI | Synaptic transmission/cell-cell signaling | 3.00 | 3 | 3 | NSF, GABBR1, GABBR2 |
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