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Tags: bash, Motif Discovery
#!/bin/bash
#./search_motif4.sh test1.fasta GRG 5
if [ $# -ne 3 ]; then
echo "Usage: $0 <fasta_file> <motif> <context>"
exit 1
fi
fasta_file=$1
motif=$2
context=$3
motif_regex=$(echo $motif | sed 's/R/[AG]/g' | sed 's/Y/[CT]/g' | sed 's/S/[GC]/g' | sed 's/W/[AT]/g' | sed 's/K/[GT]/g' | sed 's/M/[AC]/g' | sed 's/B/[CGT]/g' | sed 's/D/[AGT]/g' | sed 's/H/[ACT]/g' | sed 's/V/[ACG]/g')
grep -B1 -A1 -i -E -o ".{0,$context}${motif_regex}.{0,$context}" $fasta_file
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