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
Total Fragments
13769448
23158676
30718134
39359760
22499598
Distinct Fragments
11647484
20136773
27847275
38790858
19653021
Positions with Two Read
1158887
2039524
405892
430141
191124
NRF = Distinct/Total
0.845893
0.869513
0.906542
0.985546
0.873483
PBC1 = OneRead/Distinct
0.875753
0.881046
0.976158
0.987876
0.977996
PBC2 = OneRead/TwoRead
8.80182
8.698804
66.971857
89.08832
100.565999
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
178654
147079
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
100.0
130.0
115.0
115.0
25 percentile
100.0
130.0
243.0
169.0
50 percentile (median)
100.0
130.0
333.0
230.0
75 percentile
129.0
169.0
490.75
335.0
Max size
3246.0
3382.0
3379.0
3379.0
Mean
130.95711822853113
165.46277850678888
398.1468769325912
284.60333333333335
rep1rep2idr_optoverlap_opt
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
13769735
15000000
Estimated Fragment Length
100
130
Cross-correlation at Estimated Fragment Length
0.263082268506735
0.225880455980054
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.231983
0.1975409
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.1284662
0.1383429
NSC (Normalized Strand Cross-correlation coeff.)
2.047871
1.632758
RSC (Relative Strand Cross-correlation coeff.)
1.300428
1.478724
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
0.16189282101810068
0.23638575087207428
Synthetic AUC
0.4868296051207713
0.48975013390413985
X-intercept
0.30862153764950034
0.15820747511826075
Synthetic X-intercept
1.5485730169248656e-48
9.135516258405656e-81
Elbow Point
0.7282382249093301
0.6163433739998321
Synthetic Elbow Point
0.4935897799831345
0.5034671381038168
JS Distance
0.23268787561771054
0.24435125128837754
Synthetic JS Distance
0.4141273228676289
0.335390629839835
% Genome Enriched
41.42624648616659
53.41366666266799
Diff. Enrichment
16.93887647659657
10.403794914733833
CHANCE Divergence
0.18092302066614946
0.11599104638351118
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
0.21427389739399627
0.12519228083908662
0.25574543320237064
0.12055179544484051
0.2561456661487178
0.12066866252057357
0.13742442581602218
0.15164551598924686
0.15213184929472598
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
0.1075159449536791
0.15434400751288163
0.08247331096672876
0.11266458663594708
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
0.09395295017924396
0.12949625637672438
0.07265854657549713
0.10111803743682694
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