Table 2 Shared gene ontology annotations for enrichment analyses on CpG probes that exhibited a β values difference < − 0.1 before and after ionizing radiation of HepG2, MeWo-LC1, and U251 cell lines

Regulation of neuron projection development (GO:0010975)

2.03

4.69 × 10^–6

1.35 × 10^–3

2.42

1.05 × 10^–5

1.84 × 10^–2

2.43

6.78 × 10^–5

3.25 × 10^–2

Regulation of plasma membrane-bounded cell projection organization (GO:0120035)

1.97

2.76 × 10^–7

1.25 × 10^–4

2.14

1.58 × 10^–5

2.28 × 10^–2

2.25

2.07 × 10^–5

1.72 × 10^–2

Regulation of cell projection organization (GO:0031344)

1.92

6.05 × 10^–7

2.33 × 10^–4

2.09

3.50 × 10^–5

4.25 × 10^–2

2.19

4.32 × 10^–5

2.53 × 10^–2

Nervous system development (GO:0007399)

1.63

6.94 × 10^–12

1.22 × 10^–8

1.56

1.22 × 10^–5

1.93 × 10^–2

1.68

1.76 × 10^–6

2.53 × 10^–3