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
Total Fragments
31356115
29429566
30870419
Distinct Fragments
29853745
27333713
30125682
Positions with Two Read
1350880
1817956
676143
NRF = Distinct/Total
0.952087
0.928784
0.975875
PBC1 = OneRead/Distinct
0.952494
0.928736
0.976874
PBC2 = OneRead/TwoRead
21.049631
13.963923
43.524812
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
21256
78189
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
135.0
128.0
128.0
25 percentile
133.0
135.0
322.25
194.0
50 percentile (median)
186.0
172.0
468.0
285.0
75 percentile
298.0
249.0
636.0
447.0
Max size
1907.0
3222.0
1964.0
1964.0
Mean
247.2609616108393
231.43860389568866
503.13678299237864
349.36909379968205
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
135
Cross-correlation at Estimated Fragment Length
0.176082550289964
0.174512675793992
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.175969
0.173745
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1699526
0.1661458
NSC (Normalized Strand Cross-correlation coeff.)
1.036068
1.050359
RSC (Relative Strand Cross-correlation coeff.)
1.018876
1.101021
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
0.28388824283673897
0.2687276132906464
Synthetic AUC
0.49280595691513324
0.49258939979972277
X-intercept
0.10510910377754586
0.11430405105504972
Synthetic X-intercept
3.171842412885833e-165
1.2895728458107364e-155
Elbow Point
0.5963240204252188
0.5971737383188781
Synthetic Elbow Point
0.4987665022735129
0.502607480772417
JS Distance
0.04628589851913782
0.0539003055407815
Synthetic JS Distance
0.26760195216457144
0.2902231577020078
% Genome Enriched
42.47609793548542
38.72154444724352
Diff. Enrichment
11.537886499834771
15.485100293907955
CHANCE Divergence
0.10424754660365211
0.13679353912523917
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
0.02459368555864688
0.0592555933101548
0.04563108085937547
0.06401728457365441
0.045829468295609105
0.06380614301083277
0.028975163621595208
0.041306259104731576
0.041304294584748276
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
0.02425437298874081
0.01817908429419236
0.032509554881580104
0.02650157102663064
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
0.013125792929378257
0.009344741108845289
0.019335995909241944
0.015432057534765783
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