Hey, thanks for that..but the quality and the last five nucleotides aren't the same in every sequence. It can also be like AAACT in another sequence..:(
Please can you put a complete sequence or two in the comment, with a short explanation of what needs removing. Many of us aren't chemists (I only got a low grade at Chem A level 30 years ago :-)
If you spot any bugs in my solutions, it's because I've deliberately left them in as an exercise for the reader! :-)