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Table 3 ChIP-seq from primary cells isolated from human monozygotic twins

From: Limitations and possibilities of low cell number ChIP-seq

Twin Pair

Twin pair 1

Twin pair 2

Twin pair 3

CD4 + cells

Cell no. / IP

5 x 105

5 x 105

5 x 105

5 x 105

5 x 105

5 x 105

No. reads

35 244 517

44 255 574

40 644 508

45 738 891

38 332 819

29 484 478

No. unique, nonduplicate reads

3 978 339

6 524 094

3 316 312

3 340 926

3 130 804

1 167 824

No. Peaks called

14 828

12 622

15 598

15 731

15 825

13 719

No. overlapping peaks (%)

12 457 (82%)

14 833 (94%)

13 091 (83%)

CD8 + cells

Cell no. / IP

4.3 x 105

3.7 x 105

4.7 x 105

5 x 105

3.8 x 105

4.2 x 105

No. reads

45 245 361

35 681 254

38 455 042

35 257 788

34 505 357

41 729 689

No. unique, nonduplicate reads

18 996 309

4 778 486

12 403 566

6 654 203

5 840 308

4 438 574

No. Peaks called

17 704

18 720

20 728

18 145

18 743

20 899

No. overlapping peaks (%)

14 578 (78%)

18 828 (76%)

15 312 (73%)

  1. Peaks were called using MACS, allowing no ambiguously mapping or duplicate reads. Peaks with p-values > 1x10-10 were excluded from analysis. Numbers of overlapping peaks were counted, and expressed as a percentage of the highest peak count for the twin pair.