Open chromatin assays are known to have significant GC bias. Please take this
into consideration as necessary.
Library complexity quality metrics
Library complexity (filtered non-mito BAM)
rep1
rep2
ctl1
ctl2
ctl3
ctl4
Total Fragments
25890160
17348593
22255950
25876528
21948765
3296444
Distinct Fragments
22982568
12450402
22009026
25589391
21722498
3284913
Positions with Two Read
1160135
2472471
221084
262485
203323
11230
NRF = Distinct/Total
0.887695
0.717661
0.988905
0.988904
0.989691
0.996502
PBC1 = OneRead/Distinct
0.932972
0.729725
0.989564
0.98933
0.9903
0.99654
PBC2 = OneRead/TwoRead
18.48242
3.674609
98.511643
96.448776
105.801011
291.500089
Mitochondrial reads are filtered out by default.
The non-redundant fraction (NRF) is the fraction of non-redundant mapped reads
in a dataset; it is the ratio between the number of positions in the genome
that uniquely mapped reads map to and the total number of uniquely mappable
reads. The NRF should be > 0.8. The PBC1 is the ratio of genomic locations
with EXACTLY one read pair over the genomic locations with AT LEAST one read
pair. PBC1 is the primary measure, and the PBC1 should be close to 1.
Provisionally 0-0.5 is severe bottlenecking, 0.5-0.8 is moderate bottlenecking,
0.8-0.9 is mild bottlenecking, and 0.9-1.0 is no bottlenecking. The PBC2 is
the ratio of genomic locations with EXACTLY one read pair over the genomic
locations with EXACTLY two read pairs. The PBC2 should be significantly
greater than 1. See more details at
the ENCODE portal standard for ChIP-Seq pipeline
NRF (non redundant fraction)
PBC1 (PCR Bottleneck coefficient 1)
PBC2 (PCR Bottleneck coefficient 2)
PBC1 is the primary measure. Provisionally
N1: Replicate 1 self-consistent peaks (comparing two pseudoreplicates generated by subsampling Rep1 reads)
N2: Replicate 2 self-consistent peaks (comparing two pseudoreplicates generated by subsampling Rep2 reads)
Ni: Replicate i self-consistent peaks (comparing two pseudoreplicates generated by subsampling RepX reads)
Nt: True Replicate consistent peaks (comparing true replicates Rep1 vs Rep2)
Np: Pooled-pseudoreplicate consistent peaks (comparing two pseudoreplicates generated by subsampling pooled reads from Rep1 and Rep2)
Self-consistency Ratio: max(N1,N2) / min (N1,N2)
Rescue Ratio: max(Np,Nt) / min (Np,Nt)
Reproducibility Test: If Self-consistency Ratio >2 AND Rescue Ratio > 2, then 'Fail' else 'Pass'
Number of raw peaks
rep1
rep2
Number of peaks
70736
151149
Top 500000 raw peaks from macs2 with p-val threshold 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
115.0
185.0
150.0
150.0
25 percentile
115.0
185.0
457.25
258.0
50 percentile (median)
148.0
185.0
692.0
358.0
75 percentile
219.0
210.0
1001.0
575.0
Max size
4158.0
4384.0
4362.0
4362.0
Mean
205.39804342908843
231.55684126259519
763.7365542388332
476.1806832776779
rep1rep2idr_optoverlap_opt
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
15000000
15000000
Estimated Fragment Length
115
185
Cross-correlation at Estimated Fragment Length
0.286321463362581
0.22883664669016
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.2455024
0.178397
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1453057
0.1053616
NSC (Normalized Strand Cross-correlation coeff.)
1.970477
2.171916
RSC (Relative Strand Cross-correlation coeff.)
1.407389
1.690619
Performed on subsampled (15000000) reads mapped from FASTQs that are trimmed to 50.
Such FASTQ trimming and subsampling reads are for cross-corrleation analysis only.
Untrimmed FASTQs are used for all the other analyses.
NOTE1: For SE datasets, reads from replicates are randomly subsampled to 15000000.
NOTE2: For PE datasets, the first end (R1) of each read-pair is selected and trimmed to 50 the reads are then randomly subsampled to 15000000.
Normalized strand cross-correlation coefficient (NSC) = col9 in outFile
Relative strand cross-correlation coefficient (RSC) = col10 in outFile
Estimated fragment length = col3 in outFile, take the top value
rep1rep2
Jensen-Shannon distance (filtered/deduped BAM)
rep1
rep2
AUC
0.18828806397756143
0.1702234163156808
Synthetic AUC
0.4903964719466002
0.4882581014381453
X-intercept
0.1861362027806768
0.2854532295277968
Synthetic X-intercept
3.741150580270082e-92
2.689942897522822e-61
Elbow Point
0.7147786934737667
0.6591511618142777
Synthetic Elbow Point
0.49372363469468944
0.5072623851259332
JS Distance
0.21056593909378438
0.2036560420425857
Synthetic JS Distance
0.4210289294242251
0.4072213092268085
% Genome Enriched
25.38157331765854
30.68161370425019
Diff. Enrichment
21.322190217000585
27.642545538021974
CHANCE Divergence
0.18456443332990452
0.24680379854932194
Peak enrichment
Fraction of reads in peaks (FRiP)
FRiP for macs2 raw peaks
rep1
rep2
rep1-pr1
rep2-pr1
rep1-pr2
rep2-pr2
pooled
pooled-pr1
pooled-pr2
Fraction of Reads in Peaks
0.17339149324778397
0.2108321107775225
0.171661423086475
0.21143167368053345
0.17194097991856494
0.21163788837531902
0.17271009050948458
0.1717459985809009
0.1717320876510188
FRiP for overlap peaks
rep1_vs_rep2
rep1-pr1_vs_rep1-pr2
rep2-pr1_vs_rep2-pr2
pooled-pr1_vs_pooled-pr2
Fraction of Reads in Peaks
0.151127190672049
0.1516596967058182
0.15534420784418168
0.15645215183660202
FRiP for IDR peaks
rep1_vs_rep2
rep1-pr1_vs_rep1-pr2
rep2-pr1_vs_rep2-pr2
pooled-pr1_vs_pooled-pr2
Fraction of Reads in Peaks
0.1386009971280839
0.13392098172795946
0.14413625526758425
0.13102036947061266
For macs2 raw peaks:
repX: Peak from true replicate X
repX-prY: Peak from Yth pseudoreplicates from replicate X
pooled: Peak from pooled true replicates (pool of rep1, rep2, ...)
pooled-pr1: Peak from 1st pooled pseudo replicate (pool of rep1-pr1, rep2-pr1, ...)
pooled-pr2: Peak from 2nd pooled pseudo replicate (pool of rep1-pr2, rep2-pr2, ...)
For overlap/IDR peaks:
repX_vs_repY: Comparing two peaks from true replicates X and Y
repX-pr1_vs_repX-pr2: Comparing two peaks from both pseudoreplicates from replicate X
pooled-pr1_vs_pooled-pr2: Comparing two peaks from 1st and 2nd pooled pseudo replicates