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
7850210
9456854
579915
776487
Distinct Fragments
378698
444100
29612
40375
Positions with Two Read
27221
32629
1244
1466
NRF = Distinct/Total
0.04824
0.046961
0.051063
0.051997
PBC1 = OneRead/Distinct
0.221517
0.222328
0.068722
0.065684
PBC2 = OneRead/TwoRead
3.081738
3.02602
1.635852
1.809004
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
5678
5234
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
150.0
150.0
150.0
150.0
25 percentile
154.0
158.0
185.0
180.0
50 percentile (median)
211.0
217.0
242.0
235.0
75 percentile
299.0
303.0
329.0
315.0
Max size
2975.0
4855.0
4803.0
4803.0
Mean
252.896090172596
257.90771876194117
282.69988457098884
272.6216621662166
rep1rep2idr_optoverlap_opt
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
7850210
9456854
Estimated Fragment Length
95
185
Cross-correlation at Estimated Fragment Length
0.386473665471152
0.421158442524564
Phantom Peak
70
70
Cross-correlation at Phantom Peak
0.3864968
0.422186
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.378503
0.4144173
NSC (Normalized Strand Cross-correlation coeff.)
1.021058
1.016266
RSC (Relative Strand Cross-correlation coeff.)
0.9971089
0.8677273
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
0.3652913139565758
0.3652913139565758
Synthetic AUC
0.4991779715745877
0.4991779715745877
X-intercept
0.043175796656728556
0.043175796656728556
Synthetic X-intercept
1e-323
1e-323
Elbow Point
0.5189768103854285
0.5189768103854285
Synthetic Elbow Point
0.5000976225608418
0.5000976225608418
JS Distance
0.2670066144843168
0.2670066144843168
Synthetic JS Distance
0.1932217686601569
0.1932217686601569
% Genome Enriched
49.857775066755465
49.857775066755465
Diff. Enrichment
14.643097344308275
14.643097344308275
CHANCE Divergence
0.12777932525852032
0.12777932525852032
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
0.3078031926301818
0.2719307548226268
0.3106648294727982
0.2744068578989524
0.3122946308616196
0.27375640687010394
0.20284908095795973
0.20209168993786147
0.20520636331514128
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
0.12085431578993139
0.2778679850758348
0.24591418410053645
0.180397397081669
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
0.013775518289729853
0.2202260274526943
0.19966519614455244
0.14962603888655493
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