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
30296455
42690608
32597500
Distinct Fragments
25965040
30199385
31735311
Positions with Two Read
3209873
6470176
759022
NRF = Distinct/Total
0.857032
0.707401
0.97355
PBC1 = OneRead/Distinct
0.85793
0.703893
0.97526
PBC2 = OneRead/TwoRead
6.9399
3.285402
40.776379
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
71880
118147
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
160.0
110.0
135.0
135.0
25 percentile
160.0
110.0
328.0
167.0
50 percentile (median)
166.0
110.0
489.0
226.0
75 percentile
218.0
150.0
722.0
349.0
Max size
2398.0
1942.0
2499.0
2499.0
Mean
215.12634947134111
145.89274378528444
551.4480830670926
310.4067331083732
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
160
110
Cross-correlation at Estimated Fragment Length
0.184759925319794
0.178941907557137
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.1666843
0.1666558
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1439771
0.132048
NSC (Normalized Strand Cross-correlation coeff.)
1.283259
1.355127
RSC (Relative Strand Cross-correlation coeff.)
1.796027
1.355009
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
0.2841570676628208
0.27680503287815617
Synthetic AUC
0.49100509680148985
0.4924197869103636
X-intercept
0.12055652855417737
0.11721767711907104
Synthetic X-intercept
3.231198751759554e-105
1.1395633862626217e-148
Elbow Point
0.548817206880833
0.5655674447989891
Synthetic Elbow Point
0.5141917945328354
0.5035148143062379
JS Distance
0.10782884342206811
0.12031172608906972
Synthetic JS Distance
0.26438290783236323
0.2826801909986342
% Genome Enriched
36.29611413673696
35.95143270714874
Diff. Enrichment
19.504259177317536
21.044859435616292
CHANCE Divergence
0.16754795758896582
0.18089938601124167
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
0.059870442885088415
0.07472317451362019
0.05948636042395397
0.09959441461284547
0.05943129907720337
0.09964799843046211
0.043406696817769236
0.056988589062418604
0.056956646937940225
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
0.039632373565447215
0.037563665503501195
0.04885882569934181
0.0409413682354531
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
0.03539310595594418
0.03377461695568836
0.037852651740034736
0.032774201989198476
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