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
19615528
31798605
17198856
24243200
19333997
24729367
Distinct Fragments
18333799
25635709
17073203
24009839
19139394
24537431
Positions with Two Read
577043
3430423
113955
201213
172224
178029
NRF = Distinct/Total
0.934657
0.80619
0.992694
0.990374
0.989935
0.992239
PBC1 = OneRead/Distinct
0.957551
0.83471
0.993141
0.991338
0.990702
0.992574
PBC2 = OneRead/TwoRead
30.423294
6.237824
148.796464
118.291855
110.097495
136.80479
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
38648
179124
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
120.0
100.0
110.0
110.0
25 percentile
120.0
100.0
305.0
192.0
50 percentile (median)
148.0
100.0
462.0
270.0
75 percentile
220.0
135.0
701.0
442.0
Max size
1919.0
1863.0
2040.0
2040.0
Mean
214.074803353343
134.08562783323285
527.9296738497379
361.0795867610484
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
120
100
Cross-correlation at Estimated Fragment Length
0.265343160271959
0.252279161655579
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.2299349
0.2225274
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1420357
0.1261145
NSC (Normalized Strand Cross-correlation coeff.)
1.868145
2.000397
RSC (Relative Strand Cross-correlation coeff.)
1.402828
1.308587
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
0.20687444203181707
0.23312720158013056
Synthetic AUC
0.4888913076387179
0.49126130533405177
X-intercept
0.20317854472315192
0.1364247069972769
Synthetic X-intercept
1.3222061961613553e-68
1.5150400502143878e-111
Elbow Point
0.6820095728218232
0.6646473370840881
Synthetic Elbow Point
0.508801413979558
0.49821820802800393
JS Distance
0.19196283601587866
0.219838403097623
Synthetic JS Distance
0.3665454126711045
0.3621655825352352
% Genome Enriched
29.574581239028642
31.751058648528687
Diff. Enrichment
14.808189024276963
14.966010858394775
CHANCE Divergence
0.13090158900374183
0.13062522162773
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
0.12282226508906288
0.16400201957745852
0.1254385582634623
0.16371389759246205
0.1250834474427812
0.16377135562745726
0.13499148784384757
0.1351187107037023
0.13490974785746176
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
0.11877292764359274
0.10713708573420494
0.12375474833849114
0.12014308976527076
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
0.11084195671075704
0.09473943394791288
0.11547396021660693
0.11121426547722603
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