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
9326085
8402444
7825993
Distinct Fragments
8114679
7329734
6938390
Positions with Two Read
980580
871180
740339
NRF = Distinct/Total
0.870106
0.872334
0.886583
PBC1 = OneRead/Distinct
0.865661
0.868075
0.883172
PBC2 = OneRead/TwoRead
7.163677
7.303613
8.27701
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
87881
2389
N1
66534
1787
N2
54433
1487
Np
87461
2470
N optimal
87881
2470
N conservative
87881
2389
Optimal Set
rep1_vs_rep2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0048021403825704
1.033905399748849
Self Consistency Ratio
1.222309995774622
1.2017484868863484
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
129004
133620
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
81.0
76.0
86.0
86.0
25 percentile
324.0
304.0
344.0
344.0
50 percentile (median)
324.0
304.0
344.0
344.0
75 percentile
324.0
304.0
344.0
344.0
Max size
659.0
488.0
819.0
819.0
Mean
323.5028526247248
303.67587935937735
312.5449392712551
343.1192976866444
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
8818027
7939065
Estimated Fragment Length
175
170
Cross-correlation at Estimated Fragment Length
0.73203505244897
0.711974572568454
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.7282543
0.7089098
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.7212347
0.7027816
NSC (Normalized Strand Cross-correlation coeff.)
1.014975
1.013081
RSC (Relative Strand Cross-correlation coeff.)
1.538609
1.500101
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
0.4114686931025663
0.4124114701434733
Synthetic AUC
0.49842318323463825
0.4983410303853186
X-intercept
0.018840047279813435
0.019045698495351884
Synthetic X-intercept
0.0
0.0
Elbow Point
0.5549927323259751
0.5458003226527809
Synthetic Elbow Point
0.5004151174628397
0.5001825959952251
JS Distance
0.08308928539247787
0.08104810754906905
Synthetic JS Distance
0.1401316915866727
0.1363586760783342
% Genome Enriched
45.43434335367217
45.260038973900265
Diff. Enrichment
5.968527031136994
5.843158325656994
CHANCE Divergence
0.05087141815579237
0.04978825495162253
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
0.567680799077987
0.5726527597160861
0.5350935339108986
0.48366648363749115
0.5547207443375483
0.5092569024548868
0.5679191975200226
0.5712076847202817
0.5714402354146745
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
0.42205474426928974
0.3398495274683058
0.27819647478730003
0.42095017223895265
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
0.033243451744962196
0.029059946215904724
0.023563667882898712
0.033967753860527694
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