User:Alex S. Nord/Notebook/Computational Work/2011/10/19: Difference between revisions

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==Mapping alignments to barcodes using command line BLAST==
'''BLAST command line manual:'''
http://www.ncbi.nlm.nih.gov/books/NBK1763/
'''BLAST command line dmg for Mac:'''
ftp://ftp.ncbi.nlm.nih.gov/blast/executables/blast+/LATEST/ncbi-blast-2.2.25+.dmg
'''samtools call for viewing .bam:'''
samtools view filename.bam > filename.sam
note: this can also be piped to awk, etc. for parsing
'''UNIX command to convert sam to fasta using awk'''
awk '{OFS="\t"; print ">"$1"\n"$10}' filename.sam > filename.fa
'''command line call to generate indexed reference files for mapping to:'''
makeblastdb -in reference.fa -dbtype nucl -parse_seqids -out reference.fa -title "Reference_Title"
'''command line blastn call:'''
blastn -task 'blastn-short' -query query.fa -db reference_index.fa -outfmt '6 qseqid sseqid pident length mismatch gapopen qstart qend sstart send evalue bitscore qseq sseq' -max_target_seqs 1 -reward 2 -gapopen 4 > output.txt
'''R script for summarizing data:'''
[~/Work/BLAST/BLAST_parsing.R BLAST_parsing.R]
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Revision as of 12:51, 19 October 2011

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