remove indrops v1 or v2 linker by matching poly-T

        for convFile in "${convFiles[@]}"; do

            #remove adapter if present

            sed -E '

                /^(.{8})GAGTG............GCCTT(.{8})/ {

                s/^(.{8})GAGTG............GCCTT(.{8})/\1\2/g

                /(.{8,8}?).{22}(.{8})(.{6})T{1,}$/ {

                s/.*?(.{8,8}?).{22}(.{8})(.{6})T{1,}$/\1\2\3/g

                n

                n

                s/^(.{8}).{22}(.{8})/\1\2/g

                }' $convFile |

                s/^(.{8}).{22}(.{8})(.{6}).*/\1\2\3/g

                }' $convFile > ${crIN}/.temp

            #remove linker between barcode and UMI

            echo "  ... barcode and UMI linker removed for ${technology}"

            sed -E '2~2s/^(.{8})(.{8}).{4}(.{6})/\1\2\3/g' > ${crIN}/.temp

            mv ${crIN}/.temp $convFile

        done

    fi