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
14084335
13898779
12714374
Distinct Fragments
13979542
13749992
11305381
Positions with Two Read
81720
121446
1377145
NRF = Distinct/Total
0.99256
0.989295
0.889181
PBC1 = OneRead/Distinct
0.993687
0.99043
0.87708
PBC2 = OneRead/TwoRead
169.98649
112.135525
7.200201
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
14279
17282
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
105.0
112.0
112.0
25 percentile
120.0
105.0
200.0
158.0
50 percentile (median)
136.0
135.0
255.0
207.0
75 percentile
186.0
202.0
351.0
287.0
Max size
1108.0
1374.0
1199.0
1199.0
Mean
169.2640240913229
177.64205531767158
292.45001519295045
241.54349919743177
rep1rep2idr_optoverlap_opt
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
14084335
13898779
Estimated Fragment Length
120
105
Cross-correlation at Estimated Fragment Length
0.175128042407579
0.187907130914966
Phantom Peak
35
40
Cross-correlation at Phantom Peak
0.1726309
0.1808793
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1609024
0.1571516
NSC (Normalized Strand Cross-correlation coeff.)
1.088411
1.195706
RSC (Relative Strand Cross-correlation coeff.)
1.212911
1.296184
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
0.24240903171364092
0.22272616099359946
Synthetic AUC
0.4834553905707722
0.48333590321119135
X-intercept
0.22680670017554172
0.2549513561497583
Synthetic X-intercept
1.756678898683012e-30
4.901175157537866e-30
Elbow Point
0.6200781340594923
0.6457116237409181
Synthetic Elbow Point
0.4930405089421156
0.49488701523978074
JS Distance
0.08962746208030539
0.09060204861251185
Synthetic JS Distance
0.247531487148338
0.27313579976613245
% Genome Enriched
36.693017918051204
34.293214652735294
Diff. Enrichment
18.22507209376526
17.890001847797688
CHANCE Divergence
0.1628487012259446
0.16056429585138252
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
0.022665034139250202
0.04116420740498046
0.07281243775416679
0.08764721080837799
0.0731463161661339
0.08761330998288953
0.02762899085978587
0.0312671118522545
0.031451379299787814
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
0.023606213330277032
0.017341220747823353
0.03472202313656725
0.025568271429205553
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
0.01731725816127249
0.013005259875175874
0.027925975343076975
0.019619831662715692
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