Provided by: macs_2.1.0.20151222-1_amd64 
NAME
macs2_callpeak - Model-based Analysis for ChIP-Sequencing
DESCRIPTION
usage: macs2 callpeak [-h] -t TFILE [TFILE ...] [-c [CFILE [CFILE ...]]]
[-f {AUTO,BAM,SAM,BED,ELAND,ELANDMULTI,ELANDEXPORT,BOWTIE,BAMPE}]
[-g GSIZE] [--keep-dup KEEPDUPLICATES] [--buffer-size BUFFER_SIZE] [--outdir OUTDIR] [-n NAME]
[-B] [--verbose VERBOSE] [--trackline] [--SPMR] [-s TSIZE] [--bw BW] [-m MFOLD MFOLD]
[--fix-bimodal] [--nomodel] [--shift SHIFT] [--extsize EXTSIZE] [-q QVALUE | -p PVALUE]
[--to-large] [--ratio RATIO] [--down-sample] [--seed SEED] [--nolambda] [--slocal SMALLLOCAL]
[--llocal LARGELOCAL] [--broad] [--broad-cutoff BROADCUTOFF] [--cutoff-analysis] [--call-summits]
[--fe-cutoff FECUTOFF]
optional arguments:
-h, --help
show this help message and exit
Input files arguments:
-t TFILE [TFILE ...], --treatment TFILE [TFILE ...]
ChIP-seq treatment file. If multiple files are given as '-t A B C', then they will all be read and
pooled together. REQUIRED.
-c [CFILE [CFILE ...]], --control [CFILE [CFILE ...]]
Control file. If multiple files are given as '-c A B C', they will be pooled to estimate ChIP-seq
background noise.
-f {AUTO,BAM,SAM,BED,ELAND,ELANDMULTI,ELANDEXPORT,BOWTIE,BAMPE}, --format
{AUTO,BAM,SAM,BED,ELAND,ELANDMULTI,ELANDEXPORT,BOWTIE,BAMPE}
Format of tag file, "AUTO", "BED" or "ELAND" or "ELANDMULTI" or "ELANDEXPORT" or "SAM" or "BAM" or
"BOWTIE" or "BAMPE". The default AUTO option will let MACS decide which format the file is. Please
check the definition in README file if you choose ELAND/ELANDMULTI/ELANDEXPORT/SAM/BAM/BOWTIE.
DEFAULT: "AUTO"
-g GSIZE, --gsize GSIZE
Effective genome size. It can be 1.0e+9 or 1000000000, or shortcuts:'hs' for human (2.7e9), 'mm'
for mouse (1.87e9), 'ce' for C. elegans (9e7) and 'dm' for fruitfly (1.2e8), Default:hs
--keep-dup KEEPDUPLICATES
It controls the MACS behavior towards duplicate tags at the exact same location -- the same
coordination and the same strand. The 'auto' option makes MACS calculate the maximum tags at the
exact same location based on binomal distribution using 1e-5 as pvalue cutoff; and the 'all'
option keeps every tags. If an integer is given, at most this number of tags will be kept at the
same location. The default is to keep one tag at the same location. Default: 1
--buffer-size BUFFER_SIZE
Buffer size for incrementally increasing internal array size to store reads alignment information.
In most cases, you don't have to change this parameter. However, if there are large number of
chromosomes/contigs/scaffolds in your alignment, it's recommended to specify a smaller buffer size
in order to decrease memory usage (but it will take longer time to read alignment files). Minimum
memory requested for reading an alignment file is about # of CHROMOSOME * BUFFER_SIZE * 2 Bytes.
DEFAULT: 100000
Output arguments:
--outdir OUTDIR
If specified all output files will be written to that directory. Default: the current working
directory
-n NAME, --name NAME
Experiment name, which will be used to generate output file names. DEFAULT: "NA"
-B, --bdg
Whether or not to save extended fragment pileup, and local lambda tracks (two files) at every bp
into a bedGraph file. DEFAULT: False
--verbose VERBOSE
Set verbose level of runtime message. 0: only show critical message, 1: show additional warning
message, 2: show process information, 3: show debug messages. DEFAULT:2
--trackline
Tells MACS to include trackline with bedGraph files. To include this trackline while displaying
bedGraph at UCSC genome browser, can show name and description of the file as well. However my
suggestion is to convert bedGraph to bigWig, then show the smaller and faster binary bigWig file
at UCSC genome browser, as well as downstream analysis. Require -B to be set. Default: Not include
trackline.
--SPMR If True, MACS will save signal per million reads for fragment pileup profiles. Require -B to be
set. Default: False
Shifting model arguments:
-s TSIZE, --tsize TSIZE
Tag size. This will override the auto detected tag size. DEFAULT: Not set
--bw BW
Band width for picking regions to compute fragment size. This value is only used while building
the shifting model. DEFAULT: 300
-m MFOLD MFOLD, --mfold MFOLD MFOLD
Select the regions within MFOLD range of highconfidence enrichment ratio against background to
build model. Fold-enrichment in regions must be lower than upper limit, and higher than the lower
limit. Use as "-m 10 30". DEFAULT:5 50
--fix-bimodal
Whether turn on the auto pair model process. If set, when MACS failed to build paired model, it
will use the nomodel settings, the --exsize parameter to extend each tags towards 3' direction.
Not to use this automate fixation is a default behavior now. DEFAULT: False
--nomodel
Whether or not to build the shifting model. If True, MACS will not build model. by default it
means shifting size = 100, try to set extsize to change it. DEFAULT: False
--shift SHIFT
(NOT the legacy --shiftsize option!) The arbitrary shift in bp. Use discretion while setting it
other than default value. When NOMODEL is set, MACS will use this value to move cutting ends (5')
towards 5'->3' direction then apply EXTSIZE to extend them to fragments. When this value is
negative, ends will be moved toward 3'->5' direction. Recommended to keep it as default 0 for
ChIP-Seq datasets, or -1 * half of EXTSIZE together with EXTSIZE option for detecting enriched
cutting loci such as certain DNAseI-Seq datasets. Note, you can't set values other than 0 if
format is BAMPE for paired-end data. DEFAULT: 0.
--extsize EXTSIZE
The arbitrary extension size in bp. When nomodel is true, MACS will use this value as fragment
size to extend each read towards 3' end, then pile them up. It's exactly twice the number of
obsolete SHIFTSIZE. In previous language, each read is moved 5'->3' direction to middle of
fragment by 1/2 d, then extended to both direction with 1/2 d. This is equivalent to say each read
is extended towards 5'->3' into a d size fragment. DEFAULT: 200. EXTSIZE and SHIFT can be combined
when necessary. Check SHIFT option.
Peak calling arguments:
-q QVALUE, --qvalue QVALUE
Minimum FDR (q-value) cutoff for peak detection. DEFAULT: 0.05. -q, and -p are mutually
exclusive.
-p PVALUE, --pvalue PVALUE
Pvalue cutoff for peak detection. DEFAULT: not set. -q, and -p are mutually exclusive. If pvalue
cutoff is set, qvalue will not be calculated and reported as -1 in the final .xls file.
--to-large
When set, scale the small sample up to the bigger sample. By default, the bigger dataset will be
scaled down towards the smaller dataset, which will lead to smaller p/qvalues and more specific
results. Keep in mind that scaling down will bring down background noise more. DEFAULT: False
--ratio RATIO
When set, use a custom scaling ratio of ChIP/control (e.g. calculated using NCIS) for linear
scaling. DEFAULT: ingore
--down-sample
When set, random sampling method will scale down the bigger sample. By default, MACS uses linear
scaling. Warning: This option will make your result unstable and irreproducible since each time,
random reads would be selected. Consider to use 'randsample' script instead. <not implmented>If
used together with --SPMR, 1 million unique reads will be randomly picked.</not implemented>
Caution: due to the implementation, the final number of selected reads may not be as you expected!
DEFAULT: False
--seed SEED
Set the random seed while down sampling data. Must be a non-negative integer in order to be
effective. DEFAULT: not set
--nolambda
If True, MACS will use fixed background lambda as local lambda for every peak region. Normally,
MACS calculates a dynamic local lambda to reflect the local bias due to potential chromatin
structure.
--slocal SMALLLOCAL
The small nearby region in basepairs to calculate dynamic lambda. This is used to capture the bias
near the peak summit region. Invalid if there is no control data. If you set this to 0, MACS will
skip slocal lambda calculation. *Note* that MACS will always perform a d-size local lambda
calculation. The final local bias should be the maximum of the lambda value from d, slocal, and
llocal size windows. DEFAULT: 1000
--llocal LARGELOCAL
The large nearby region in basepairs to calculate dynamic lambda. This is used to capture the
surround bias. If you set this to 0, MACS will skip llocal lambda calculation. *Note* that MACS
will always perform a d-size local lambda calculation. The final local bias should be the maximum
of the lambda value from d, slocal, and llocal size windows. DEFAULT: 10000.
--broad
If set, MACS will try to call broad peaks by linking nearby highly enriched regions. The linking
region is controlled by another cutoff through --linking-cutoff. The maximum linking region
length is 4 times of d from MACS. DEFAULT: False
--broad-cutoff BROADCUTOFF
Cutoff for broad region. This option is not available unless --broad is set. If -p is set, this is
a pvalue cutoff, otherwise, it's a qvalue cutoff. DEFAULT: 0.1
--cutoff-analysis
While set, MACS2 will analyze number or total length of peaks that can be called by different
p-value cutoff then output a summary table to help user decide a better cutoff. The table will be
saved in NAME_cutoff_analysis.txt file. Note, minlen and maxgap may affect the results. WARNING:
May take ~30 folds longer time to finish. DEFAULT: False
Post-processing options:
--call-summits
If set, MACS will use a more sophisticated signal processing approach to find subpeak summits in
each enriched peak region. DEFAULT: False
--fe-cutoff FECUTOFF
When set, the value will be used to filter out peaks with low fold-enrichment. Note, MACS2 use 1.0
as pseudocount while calculating fold-enrichment. DEFAULT: 1.0