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
43428828
45275335
23404214
Distinct Fragments
37376805
41829537
22985096
Positions with Two Read
4283348
2712683
376172
NRF = Distinct/Total
0.860645
0.923892
0.982092
PBC1 = OneRead/Distinct
0.864537
0.927598
0.982994
PBC2 = OneRead/TwoRead
7.54401
14.303553
60.063513
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
117048
36791
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
100.0
120.0
110.0
110.0
25 percentile
102.0
121.0
160.0
133.0
50 percentile (median)
122.0
138.0
205.0
162.0
75 percentile
160.0
169.0
288.0
216.0
Max size
1710.0
933.0
1333.0
1333.0
Mean
149.37074533524708
156.91484330406894
246.3426175191551
194.51748440268042
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
100
120
Cross-correlation at Estimated Fragment Length
0.206462352383663
0.189376636148786
Phantom Peak
40
35
Cross-correlation at Phantom Peak
0.1898218
0.1831299
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1687882
0.1728697
NSC (Normalized Strand Cross-correlation coeff.)
1.223204
1.095488
RSC (Relative Strand Cross-correlation coeff.)
1.791144
1.608836
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
0.17671628857561325
0.23492855612785754
Synthetic AUC
0.49111648600536395
0.49129516847794574
X-intercept
0.2792367349305332
0.15002589135228833
Synthetic X-intercept
6.6463608476712416e-108
1.983576046778332e-112
Elbow Point
0.6639582379485252
0.6233098145219497
Synthetic Elbow Point
0.5087124881086357
0.4972185413675442
JS Distance
0.09102558106101585
0.05047037238092111
Synthetic JS Distance
0.37684028297591654
0.32707524692292494
% Genome Enriched
31.723804249380706
31.598046252551647
Diff. Enrichment
21.74734619980362
10.009506242462423
CHANCE Divergence
0.20132545650225706
0.08875553136698171
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
0.0993220404610879
0.025289351155367464
0.1743885201189863
0.058900999270244274
0.1742115468250499
0.058509381444655825
0.041960260296122126
0.05001150769257126
0.049939713664250554
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
0.02412273904549357
0.0817875840652632
0.018518893521049375
0.03420459379433519
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
0.01349112991319593
0.036678940947286985
0.007040621398741201
0.02122720741386661
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