Adding a vertical line between letters on different rows. DNA

Does anyone know how to typeset the following DNA duplex sequence in LaTeX? I would like to add a vertical line between the bases (letters) like in this picture. Thanks Here is the other example

Solved Part B Which model shows the correct polarity of

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Primer Designing - Demonstration step by step - Sharebiology

I'm pretty sure the first page is correct. I need

How to Add a Vertical Line Between Text in Microsoft Word

9.1 Cell Division