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
ctl3
ctl4
Total Fragments
29193502
17806503
8981533
20288786
22366071
37282196
Distinct Fragments
26203057
12157118
8658772
18799594
21650523
35423636
Positions with Two Read
1712144
2806375
295814
1282093
651107
1599314
NRF = Distinct/Total
0.897565
0.682735
0.964064
0.9266
0.968007
0.950149
PBC1 = OneRead/Distinct
0.91673
0.673325
0.964589
0.927184
0.968898
0.951651
PBC2 = OneRead/TwoRead
14.029846
2.916819
28.234485
13.595486
32.217679
21.078369
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
196567
499658
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
115.0
100.0
108.0
108.0
25 percentile
132.0
100.0
243.0
178.0
50 percentile (median)
176.0
100.0
355.0
238.0
75 percentile
262.0
141.0
588.0
368.0
Max size
4081.0
3024.0
4262.0
4262.0
Mean
250.75662242390635
143.7977416552922
482.6347003882077
334.9356289669649
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
115
100
Cross-correlation at Estimated Fragment Length
0.388867711473095
0.272589722925284
Phantom Peak
40
40
Cross-correlation at Phantom Peak
0.3136792
0.2230122
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1470524
0.1091722
NSC (Normalized Strand Cross-correlation coeff.)
2.644416
2.496879
RSC (Relative Strand Cross-correlation coeff.)
1.451239
1.435502
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
0.12245155673840895
0.11166865620046529
Synthetic AUC
0.4892235184348936
0.4861934097308596
X-intercept
0.28832712208697875
0.426652644711377
Synthetic X-intercept
5.796446980078249e-73
4.336443553981692e-44
Elbow Point
0.7804937540986229
0.7281733337598567
Synthetic Elbow Point
0.505636455866436
0.5062985212733386
JS Distance
0.3661515925964915
0.3142868427241992
Synthetic JS Distance
0.5108759368946273
0.4627961059687939
% Genome Enriched
13.293333439964172
19.683986180643302
Diff. Enrichment
45.50642756206823
47.14790267085554
CHANCE Divergence
0.39590049288332285
0.41019575113593854
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
0.4253922200796891
0.4665520254493855
0.40693252827189136
0.4715933483044831
0.4068046332090719
0.4716064137462676
0.4255009287542516
0.403895066062077
0.40390082106778125
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
0.3722462596355584
0.38131451079317313
0.345455934410521
0.38091889706918197
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
0.30065462580438396
0.31992084328899567
0.2744339447338395
0.32313535160616885
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