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Top Forums Shell Programming and Scripting Getting unique sequences from multiple fasta file Post 303022716 by Ibk on Wednesday 5th of September 2018 04:13:49 PM
Old 09-05-2018
Getting unique sequences from multiple fasta file

Hi,

I have a fasta file with multiple sequences. How can i get only unique sequences from the file.

For example
my_file.fasta

Code:
>seq1
TCTCAAAGAAAGCTGTGCTGCATACTGTACAAAACTTTGTCTGGAGAGATGGAGAATCTCATTGACTTTACAGGTGTGGACGGTCTTCAGAGATGGCTCAAGCTAACATTCCCTGACACACCTATAGGGAAAGAGCTAAC

>seq2
CAATTTTGGCTCCTTCATGTCTGTTGTGCCAGACTTGAGTGAGTTTGAACTGCAAGCAAGAAAGGCAGGTTCAGACCAAGAAAAAGATGCAATATACTCCAAGGCACTGATAGCAGCCACAAGAAAGGCGGCTCCTATTG

>seq3
CGGCCTGTGCATGGACATCAAGCAACGACATGGTGACAAAAGGGCTCAAGTGGTTCGAGGATCAGATAACAAAAGAGAATCCTAAATTTATCTCTTGGCACAAGGAGTATGAATTTTTCAAAAAGAATGTGCCCACAGTT

>seq1
TCTCAAAGAAAGCTGTGCTGCATACTGTACAAAACTTTGTCTGGAGAGATGGAGAATCTCATTGACTTTACAGGTGTGGACGGTCTTCAGAGATGGCTCAAGCTAACATTCCCTGACACACCTATAGGGAAAGAGCTAAC

>seq4
AAACTGCAACTCTCACAAGCAAAGTTGTGGCACAGTTCTCAGTTCCTGGGGTCTATGTTGTTGCTGTGCAAGATATGATCAAAGACATGGTTGCCAGAAGAGGTGGAGGGCCTAAACGCGGAGTCAGTGATGAACACATC

>seq1
TCTCAAAGAAAGCTGTGCTGCATACTGTACAAAACTTTGTCTGGAGAGATGGAGAATCTCATTGACTTTACAGGTGTGGACGGTCTTCAGAGATGGCTCAAGCTAACATTCCCTGACACACCTATAGGGAAAGAGCTAAC

>seq2
CAATTTTGGCTCCTTCATGTCTGTTGTGCCAGACTTGAGTGAGTTTGAACTGCAAGCAAGAAAGGCAGGTTCAGACCAAGAAAAAGATGCAATATACTCCAAGGCACTGATAGCAGCCACAAGAAAGGCGGCTCCTATTG

Note there are 3 copies of seq1 and two copies of seq2. I want to get a new file that contain only one copy of seq1, seq2, seq3 and seq4.

Thanks

Last edited by vgersh99; 09-05-2018 at 05:20 PM.. Reason: code tags, please!
 

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NTDPAL(1)						       Primer3 User Manuals							 NTDPAL(1)

NAME
ntdpal - Provides Primer3's alignment functionality SYNOPSIS
ntdpal [-g gval] [-l lval] [-m mval] [-f1, f2, f3] [-p] [-s] [-e] {seq1} {seq2} {mode} DESCRIPTION
Ntdpal (NucleoTide Dynamic Programming ALignment) is a stand-alone program that provides Primer3's alignment functionality (local, a.k.a. Smith-Waterman, global, a.k.a. Needleman-Wunsch, plus "half global"). OPTIONS
-g gval gval is a (positive) float (.01 precision) specifying penaltiy for creating a gap respectively (the penalties are subtracted from the output score) -l val lval is a (positive) float (.01 precision) specifying penaltiy for lengthening a gap respectively (the penalties are subtracted from the output score) -a Causes the scoring matrix to be modified by dpal_set_ambiguity_codes. -e Causes the end postion of the alignment in both sequences to be printed. Do not confuse with the 'e' mode. -f1, -f2, -f3 Force specific implementations. -f2 forces use an implementation that might provide more informative error messages, possibly at the expense of some speed. -h Use a different scoring matrix: G and C matches = 3, A and T = 2, and mismatches = -0.5. (The default scoring matrix assigns 1 to a match, and -1 to a mismatch.) -p Causes the alignment to be displayed on stderr. -s causes only the score to printed. -m mval is the maximum allowed gap (default is 3). seq1 and seq2 are the sequences to be aligned. mode is one of g, G, l, or L specifying a global, global end-anchored, local, or local end-achored alignment respectively. For backward compatibility e is equivalent to G. REFERENCE
Please cite Rozen, S., Skaletsky, H. "Primer3 on the WWW for general users and for biologist programmers." In S. Krawetz and S. Misener, eds. Bioinformatics Methods and Protocols in the series Methods in Molecular Biology. Humana Press, Totowa, NJ, 2000, pages 365-386. SEE ALSO
primer3_core(1) oligotm(1) COPYRIGHT
Copyright (C) 1996,1997,1998,1999,2000,2001,2004,2006,2007,2008 Whitehead Institute for Biomedical Research, Steve Rozen (http://jura.wi.mit.edu/rozen), Helen Skaletsky All rights reserved. On Debian-based systems, please consult /usr/share/doc/primer3/copyright to read the licence of ntdpal. This manual page was written by Charles Plessy <plessy@debian.org> for the Debian(TM) system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the same terms as oligotm itself. ntdpal 1.1.4 05/09/2008 NTDPAL(1)
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