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
22449016
26421985
19514491
22021952
Distinct Fragments
21725704
24795583
16359396
21162204
Positions with Two Read
660578
1452615
2406024
783699
NRF = Distinct/Total
0.96778
0.938445
0.83832
0.96096
PBC1 = OneRead/Distinct
0.968444
0.938219
0.83155
0.961553
PBC2 = OneRead/TwoRead
31.851076
16.015047
5.653998
25.964791
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
154854
117363
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
95.0
125.0
110.0
110.0
25 percentile
95.0
125.0
270.0
177.0
50 percentile (median)
97.0
139.0
375.0
249.0
75 percentile
137.0
191.0
542.0
371.0
Max size
1606.0
1798.0
1773.0
1793.0
Mean
132.86121120539346
182.9050552559154
432.2259526022305
304.75098341689164
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
95
125
Cross-correlation at Estimated Fragment Length
0.177462010013098
0.175525985550464
Phantom Peak
35
35
Cross-correlation at Phantom Peak
0.1756144
0.1732962
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1669802
0.1655691
NSC (Normalized Strand Cross-correlation coeff.)
1.062772
1.060137
RSC (Relative Strand Cross-correlation coeff.)
1.21399
1.288566
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
0.26846505503782797
0.26590975740749534
Synthetic AUC
0.48771222116725216
0.4886669718907847
X-intercept
0.14494129972329298
0.1394391484461221
Synthetic X-intercept
6.86095071025341e-56
7.120729866361571e-66
Elbow Point
0.5690108123670446
0.6004502487164313
Synthetic Elbow Point
0.49159848835299685
0.5194927694559459
JS Distance
0.06844666440378379
0.06964538411477579
Synthetic JS Distance
0.2620486746478402
0.27132065406713574
% Genome Enriched
32.337534588378304
36.77464371971018
Diff. Enrichment
17.715258725865752
17.027380822598797
CHANCE Divergence
0.15172011253468756
0.14876453042265597
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
0.06677713653362352
0.06463084933359753
0.08887560800384316
0.06612347094478963
0.08887649287181333
0.06595185801599013
0.045275652561206636
0.055035560442258255
0.05518080529566532
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
0.03561140601498423
0.031243581942003808
0.03300088010626761
0.035502789270276267
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
0.02230263146789989
0.02216589840954716
0.019439076680646376
0.022373137787671936
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