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
2417489
2261133
9942540
Distinct Fragments
2343454
2195981
9037104
Positions with Two Read
61214
53277
641344
NRF = Distinct/Total
0.969375
0.971186
0.908933
PBC1 = OneRead/Distinct
0.971752
0.973774
0.918201
PBC2 = OneRead/TwoRead
37.201555
40.137207
12.938259
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
0-0.5 is severe bottlenecking
0.5-0.8 is moderate bottlenecking
0.8-0.9 is mild bottlenecking
0.9-1.0 is no bottlenecking
Replication quality metrics
IDR (Irreproducible Discovery Rate) plots
Reproducibility QC and peak detection statistics
overlap
idr
Nt
10491
106
N1
5003
73
N2
4260
40
Np
10120
114
N optimal
10491
114
N conservative
10491
106
Optimal Set
rep1_vs_rep2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0366600790513834
1.0754716981132075
Self Consistency Ratio
1.174413145539906
1.825
Reproducibility Test
pass
pass
Reproducibility QC
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
49207
49343
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
250.0
260.0
98.0
98.0
25 percentile
250.0
260.0
256.0
256.0
50 percentile (median)
250.0
260.0
256.0
256.0
75 percentile
250.0
260.0
256.0
256.0
Max size
250.0
260.0
256.0
256.0
Mean
250.0
260.0
254.6140350877193
255.98493947192833
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
2417489
2261133
Estimated Fragment Length
65
75
Cross-correlation at Estimated Fragment Length
0.488148870393921
0.473914684649752
Phantom Peak
40
40
Cross-correlation at Phantom Peak
0.4847323
0.4690427
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.4768829
0.462711
NSC (Normalized Strand Cross-correlation coeff.)
1.023624
1.024213
RSC (Relative Strand Cross-correlation coeff.)
1.43526
1.769453
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
Jensen-Shannon distance (filtered/deduped BAM)
rep1
rep2
AUC
0.36402824007160123
0.35936614769526537
Synthetic AUC
0.4926991360053306
0.4924601447210768
X-intercept
0.042570851656464244
0.044145111215751376
Synthetic X-intercept
2.2413876354847974e-160
2.777196574139521e-150
Elbow Point
0.4988208017749826
0.4937668100592991
Synthetic Elbow Point
0.5027767846537198
0.5093555591657489
JS Distance
0.05633430335417578
0.061302598085616056
Synthetic JS Distance
0.17658890371795552
0.18244599863910432
% Genome Enriched
36.74808654636583
38.40275505399172
Diff. Enrichment
10.151433365674517
10.570598145121291
CHANCE Divergence
0.08629687967409343
0.08992817819375226
Peak enrichment
Fraction of reads in peaks (FRiP)
FRiP for spp raw peaks
rep1
rep2
rep1-pr1
rep2-pr1
rep1-pr2
rep2-pr2
pooled
pooled-pr1
pooled-pr2
Fraction of Reads in Peaks
0.21892523414162246
0.2296875602306508
0.19184275384874447
0.1835409915168072
0.17968732060651263
0.17473234336962556
0.18289347208750115
0.2219397104334632
0.22863065640376953
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
0.053010266111298866
0.02962994461394538
0.02689580579257301
0.05110495661371946
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
0.0031096792882631
0.002387659859461873
0.0025822368048107427
0.0033969460623164806
For spp 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