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
29581115
27224300
36686094
38983260
Distinct Fragments
26943714
20577690
34174655
36939155
Positions with Two Read
2242507
4128645
2235543
1866995
NRF = Distinct/Total
0.910842
0.755857
0.931542
0.947565
PBC1 = OneRead/Distinct
0.909724
0.744518
0.930658
0.947118
PBC2 = OneRead/TwoRead
10.930332
3.71077
14.226924
18.739069
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
179804
171003
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
175.0
180.0
178.0
178.0
25 percentile
188.0
187.0
311.0
284.0
50 percentile (median)
230.0
225.0
392.0
357.0
75 percentile
300.0
291.0
525.0
470.0
Max size
2069.0
1342.0
1925.0
1925.0
Mean
262.3556817423417
254.51796752103763
448.44896155545734
400.49061162849233
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
175
180
Cross-correlation at Estimated Fragment Length
0.166958806804756
0.143842922054741
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.1655035
0.1392211
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1614896
0.136044
NSC (Normalized Strand Cross-correlation coeff.)
1.033867
1.057326
RSC (Relative Strand Cross-correlation coeff.)
1.362565
2.454725
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
0.26657546249466435
0.25990532473534045
Synthetic AUC
0.49522810361408276
0.4945366714076587
X-intercept
0.13219478938203136
0.1481213425008647
Synthetic X-intercept
0.0
1.2364329744946279e-287
Elbow Point
0.5882428209552333
0.5858936243804619
Synthetic Elbow Point
0.5016704898505153
0.5082236724145428
JS Distance
0.06973843023378799
0.062281010836744845
Synthetic JS Distance
0.2879086489881233
0.2895408187619467
% Genome Enriched
39.80478676292708
39.06803873075408
Diff. Enrichment
12.083533077564596
14.043727081501778
CHANCE Divergence
0.10920839427399888
0.1265187329369048
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
0.08224505476958688
0.07948845015796814
0.0933894533118308
0.08176107456132911
0.09392234859220285
0.08178559579870759
0.06588681493555466
0.06617553563347979
0.06637787738069123
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
0.015878399601707793
0.017812554529702502
0.01183464699643434
0.016742892486299468
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
0.003907891651484911
0.0029597657394718545
0.002181178603097798
0.0043270311273288726
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