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+                                     ggcsi
+Function
+
+   GC Skew Index: an index for strand-specific mutational bias
+
+Description
+
+   ggcsi calculates the GC Skew Index (GCSI) of the given circular bacterial
+   genome. GCSI quantifies the degree of GC Skew. In other words, this index
+   represents the degree of strand-specific mutational bias in bacterial
+   genomes, caused by replicational selection. 
+   GCSI is calculated by the following formula:
+
+      GCSI = sqrt((SA/6000) * (dist/600))
+
+   where SA is the spectral amplitude of Fourier power spectrum at 1Hz,
+   and dist is the normalized Euclidean distance between the vertices of 
+   cumulative GC skew.
+
+   GCSI ranges from 0 (no observable skew) to 1 (strong skew), and Archaeal
+   genomes that have multiple replication origins and therefore have no
+   observable skew mostly have GCSI below 0.05. Escherichia coli genome has
+   values around 0.10.
+
+   Version 1 of GCSI required fixed number of windows (4096), but the new GCSI
+   version 2 (also known as generalized GCSI: gGCSI) is invariant of the number
+   of windows. GCSI version 1 is calculated as an arithmetic mean (as opposed
+   to the geometric mean of gGCSI) of SR (spectral ratio, the signal-to-noise
+   ratio of 1Hz power spectrum) and dist.
+   
+   G-language SOAP service is provided by the
+   Institute for Advanced Biosciences, Keio University.
+   The original web service is located at the following URL:
+
+   http://www.g-language.org/wiki/soap
+
+   WSDL(RPC/Encoded) file is located at:
+
+   http://soap.g-language.org/g-language.wsdl
+
+   Documentation on G-language Genome Analysis Environment methods are
+   provided at the Document Center
+
+   http://ws.g-language.org/gdoc/
+
+Usage
+
+Here is a sample session with ggcsi
+
+% ggcsi refseqn:NC_000913
+GC Skew Index: an index for strand-specific mutational bias
+Program compseq output file [nc_000913.ggcsi]: 
+
+   Go to the input files for this example
+   Go to the output files for this example
+
+Command line arguments
+
+   Standard (Mandatory) qualifiers:
+  [-sequence]          seqall     Nucleotide sequence(s) filename and optional
+                                  format, or reference (input USA)
+  [-outfile]           outfile    [*.ggcsi] Program compseq output file
+
+   Additional (Optional) qualifiers: (none)
+   Advanced (Unprompted) qualifiers:
+   -gcsi               selection  [2] GCSI version to use
+   -window             integer    [4096] Number of windows. Must be a power of
+                                  2 (Any integer value)
+   -purine             boolean    [N] Use purine skew for calculation
+   -keto               boolean    [N] Use keto skew for calculation
+   -at                 boolean    [N] Use AT skew for calculation
+   -pval               boolean    [N] Calculate p-value when GCSI version 2 is
+                                  selected
+   -[no]accid          boolean    [Y] Include to use sequence accession ID as
+                                  query
+
+   Associated qualifiers:
+
+   "-sequence" associated qualifiers
+   -sbegin1            integer    Start of each sequence to be used
+   -send1              integer    End of each sequence to be used
+   -sreverse1          boolean    Reverse (if DNA)
+   -sask1              boolean    Ask for begin/end/reverse
+   -snucleotide1       boolean    Sequence is nucleotide
+   -sprotein1          boolean    Sequence is protein
+   -slower1            boolean    Make lower case
+   -supper1            boolean    Make upper case
+   -scircular1         boolean    Sequence is circular
+   -sformat1           string     Input sequence format
+   -iquery1            string     Input query fields or ID list
+   -ioffset1           integer    Input start position offset
+   -sdbname1           string     Database name
+   -sid1               string     Entryname
+   -ufo1               string     UFO features
+   -fformat1           string     Features format
+   -fopenfile1         string     Features file name
+
+   "-outfile" associated qualifiers
+   -odirectory2        string     Output directory
+
+   General qualifiers:
+   -auto               boolean    Turn off prompts
+   -stdout             boolean    Write first file to standard output
+   -filter             boolean    Read first file from standard input, write
+                                  first file to standard output
+   -options            boolean    Prompt for standard and additional values
+   -debug              boolean    Write debug output to program.dbg
+   -verbose            boolean    Report some/full command line options
+   -help               boolean    Report command line options and exit. More
+                                  information on associated and general
+                                  qualifiers can be found with -help -verbose
+   -warning            boolean    Report warnings
+   -error              boolean    Report errors
+   -fatal              boolean    Report fatal errors
+   -die                boolean    Report dying program messages
+   -version            boolean    Report version number and exit
+
+Input file format
+
+   The database definitions for following commands are available at
+   http://soap.g-language.org/kbws/embossrc
+
+   ggcsi reads one or more nucleotide sequences.
+
+Output file format
+
+   The output from ggcsi is to a plain text file.
+
+   File: nc_000913.ggcsi
+
+Sequence: NC_000913 GCSI: 0.0966615833014818 SA: 487.218569030757 DIST: 69.037726
+
+
+Data files
+
+   None.
+
+Notes
+
+   None.
+
+References
+
+   Arakawa, K., Mori, K., Ikeda, K., Matsuzaki, T., Konayashi, Y., and
+      Tomita, M. (2003) G-language Genome Analysis Environment: A Workbench
+      for Nucleotide Sequence Data Mining, Bioinformatics, 19, 305-306.
+
+   Arakawa, K. and Tomita, M. (2006) G-language System as a Platform for
+      large-scale analysis of high-throughput omics data, J. Pest Sci.,
+      31, 7.
+
+   Arakawa, K., Kido, N., Oshita, K., Tomita, M. (2010) G-language Genome
+      Analysis Environment with REST and SOAP Web Service Interfaces,
+      Nucleic Acids Res., 38, W700-W705.
+
+Warnings
+
+   None.
+
+Diagnostic Error Messages
+
+   None.
+
+Exit status
+
+   It always exits with a status of 0.
+
+Known bugs
+
+   None.
+
+See also
+
+   gb1          Calculate strand bias of bacterial genome using B1 index
+   gb2          Calculate strand bias of bacterial genome using B2 index
+   gdeltagcskew Calculate strand bias of bacterial genome using delta GC skew
+                index
+   gldabias     Calculate strand bias of bacterial genome using linear
+                discriminant analysis (LDA)
+
+Author(s)
+
+   Hidetoshi Itaya (celery@g-language.org)
+   Institute for Advanced Biosciences, Keio University
+   252-0882 Japan
+
+   Kazuharu Arakawa (gaou@sfc.keio.ac.jp)
+   Institute for Advanced Biosciences, Keio University
+   252-0882 Japan
+
+History
+
+   2012 - Written by Hidetoshi Itaya
+   2013 - Fixed by Hidetoshi Itaya
+
+Target users
+
+   This program is intended to be used by everyone and everything, from
+   naive users to embedded scripts.
+
+Comments
+
+   None.
+