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
Total Fragments
23199619
18522740
35351730
41255400
Distinct Fragments
22447948
18111307
34784593
40736002
Positions with Two Read
699321
389333
519095
481469
NRF = Distinct/Total
0.9676
0.977788
0.983957
0.98741
PBC1 = OneRead/Distinct
0.967785
0.977972
0.984692
0.987919
PBC2 = OneRead/TwoRead
31.065552
45.494096
65.984284
83.585612
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
215823
182834
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
110.0
75.0
92.0
92.0
25 percentile
110.0
75.0
199.0
135.0
50 percentile (median)
131.0
79.0
271.0
178.0
75 percentile
174.0
114.0
374.0
252.0
Max size
3032.0
1925.0
2999.0
2999.0
Mean
155.1023245900576
101.27295798374482
312.9737541528239
210.89487444849937
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
110
75
Cross-correlation at Estimated Fragment Length
0.186159364456318
0.184217440345149
Phantom Peak
55
50
Cross-correlation at Phantom Peak
0.184269
0.1838287
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1743143
0.1736365
NSC (Normalized Strand Cross-correlation coeff.)
1.067953
1.060937
RSC (Relative Strand Cross-correlation coeff.)
1.189893
1.038137
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
0.20156882249652308
0.21641091524630007
Synthetic AUC
0.4897288720547548
0.48853027075412603
X-intercept
0.24741387928104444
0.22344202970989863
Synthetic X-intercept
1.9884260907950303e-80
2.7450045460861697e-64
Elbow Point
0.628206409820661
0.6639462582721875
Synthetic Elbow Point
0.49713979607071634
0.5092306120553107
JS Distance
0.0864967013479727
0.06893302370318925
Synthetic JS Distance
0.3328969468639794
0.31393212561347944
% Genome Enriched
36.243277285722854
31.201191594857747
Diff. Enrichment
22.302206725269365
18.62291933141893
CHANCE Divergence
0.20657454198368028
0.16417556672790695
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
0.10446309641342352
0.07453037232203646
0.0913165824289588
0.10886423412460339
0.091202382620931
0.10856709724229796
0.09587715706987002
0.09196448728101612
0.09193194434301208
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
0.025345953078697532
0.0236600927100257
0.017802854119058693
0.029067147642409252
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
0.004914269102978179
0.0035689795968721076
0.0017350996339449089
0.006925841352701456
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