Table 1.

Functional annotation cluster analyses of uniquely methylated and unmethylated genes

	Uniquely unmethylated			Uniquely methylated
Group	Cluster	No. of genes	Enrichment score	Cluster	No. of genes	Enrichment score
PTSD affected	Inflammatory response	26	2.38	Signal	55	2.16
	Immune response	38	1.5	Sensory perception of sound	15	1.07
	Innate immune response	11	1.48	Response to xenobiotic stimulus	5	1.02
PTSD unaffected	Developmental process	50	2.67	Signal	32	1.77
	Generation of neurons	37	2.2	Lipase activity	6	1.22
	Intracellular organelle	102	1.97	Calcium ion binding	10	1.17

All genes are identified in terms of DAVID IDs; genes can appear in more than one cluster.