diff --git a/workflow/KaKs/ugly.sh b/workflow/KaKs/ugly.sh
new file mode 100644
index 0000000..e1ff4e8
--- /dev/null
+++ b/workflow/KaKs/ugly.sh
@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+
+# Bash version of the Nextflow script that should run faster
+output_file="Glycine_max_duplicate_genes_KaKs.tsv"
+proteome_fasta="/home/sortion/Documents/course/master/M2/S1/comparative_genomics/project/tmp/proteome_filtered.fa"
+cds_fasta="/media/data/sync/Documents/course/master/M2/S1/comparative_genomics/data/Glycine_max.Glycine_max_v2.1.cds.all.fa"
+
+set -euo pipefail
+
+mkdir -p tmp
+
+echo "seqfile = ./tmp/cds.ali.phy
+outfile = ./tmp/yn
+verbose = 0
+icode = 0
+weighting = 0
+commonf3x4 = 0" > yn00.ctl
+compute_kaks() {
+    local gene_id_1
+    local gene_id_2
+    gene_id_1=$1
+    gene_id_2=$2
+    # Extract the proteins
+    ./scripts/extract_fasta_records.sh $gene_id_1 $gene_id_2 ${proteome_fasta} "./tmp/prot.fst"
+    # Extract the CDS
+    ./scripts/extract_fasta_records.sh $gene_id_1 $gene_id_2 ${cds_fasta} "./tmp/cds.fst"
+
+    # Run clustalw2
+    clustalw2 -quiet -align -infile="./tmp/prot.fst" -outfile="./tmp/prot.ali.aln"
+
+    # Run Pal2Nal
+    pal2nal.pl "./tmp/prot.ali.aln" "./tmp/cds.fst" -output paml > "./tmp/cds.ali.phy"
+
+    # Run yn00
+    yn00
+
+    # Extract Ka/Ks
+    awk '
+    BEGIN {
+          on_good_section=0
+          skip=0
+    }
+    $1 == "(B)" {
+         skip=8
+         on_good_section=1
+    }
+
+    on_good_section == 1 {
+        if (skip == 0) {
+            Ka=$8
+            Ks=$11
+            print Ka, Ks
+            exit
+        } else {
+            skip -= 1
+        }
+    }
+    ' "./tmp/yn"
+}
+echo "gene_a,gene_b,ka,ks" > "${output_file}"
+input="/media/data/sync/Documents/course/master/M2/S1/comparative_genomics/project/tmp/Glycine_max_duplicate_gene_pairs.tsv"
+n=$(wc -l "${input}")
+i=0
+while IFS= read -r line
+do
+    echo $i / $n
+    gene_a=$(echo $line | awk '{print $1}')
+    gene_b=$(echo $line | awk '{print $2}')
+    i=$(expr $i + 1)
+    kaks=$(compute_kaks $gene_a $gene_b | tail -1 | awk 'NF == 2')
+    if [[ ! -z $kaks ]]
+       then
+       arr=(${kaks//\t/ })
+       echo "${gene_a},${gene_b},${arr[0]},${arr[1]}" >> "${output_file}"
+    fi
+done < "${input}"