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
20229518
22161652
17198856
24243200
19333997
24729367
Distinct Fragments
19555482
20788858
17073203
24009839
19139394
24537431
Positions with Two Read
592081
1185343
113955
201213
172224
178029
NRF = Distinct/Total
0.966681
0.938055
0.992694
0.990374
0.989935
0.992239
PBC1 = OneRead/Distinct
0.967885
0.938815
0.993141
0.991338
0.990702
0.992574
PBC2 = OneRead/TwoRead
31.967694
16.465178
148.796464
118.291855
110.097495
136.80479
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
139224
213745
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
90.0
85.0
88.0
88.0
25 percentile
90.0
85.0
277.0
183.0
50 percentile (median)
123.0
107.0
395.0
269.0
75 percentile
203.0
181.0
574.0
407.0
Max size
2980.0
2354.0
3221.0
3221.0
Mean
180.38892001379074
162.59901284240567
461.70442902299897
332.8542864726179
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
90
85
Cross-correlation at Estimated Fragment Length
0.218483846936243
0.213987584136038
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.2125842
0.209574
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1615382
0.1587911
NSC (Normalized Strand Cross-correlation coeff.)
1.352521
1.347604
RSC (Relative Strand Cross-correlation coeff.)
1.115576
1.086911
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
0.21875511441493345
0.2064937852003627
Synthetic AUC
0.488960623605279
0.4894695011664095
X-intercept
0.1775650484039299
0.18306522234618106
Synthetic X-intercept
1.7707558851283847e-69
1.8565937660044864e-76
Elbow Point
0.6818836146399395
0.6783507875385372
Synthetic Elbow Point
0.5080337330664835
0.5027662534221174
JS Distance
0.16960580272870676
0.17173607739513408
Synthetic JS Distance
0.3493264895037891
0.36928631504263665
% Genome Enriched
30.628631294410255
30.521666806620203
Diff. Enrichment
15.37233097355512
17.583455363555224
CHANCE Divergence
0.13495821894913748
0.15522592014651768
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
0.17178804123409963
0.20572791371267096
0.1859061288894986
0.22048749118318403
0.18605743291389923
0.22114804834197
0.1885458073182728
0.18294428584070438
0.18310379011367542
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
0.15790979569222546
0.13228658009350627
0.15300680121546123
0.16180829687981368
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
0.10717855459631
0.09076735337163537
0.10681511149312682
0.11617231022784749
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