1. The problem statement, all variables and given/known data Rewrite following sequence as double stranded molecule, with an inversion of the sequence between nucleotide 4 and 12. 5'-TCTCGCATGGTAGGT-3' 2. Relevant equations none. 3. The attempt at a solution I've read in the textbook that you take the section and rotate it 180 degrees, then reinsert it. However I think that I'm not understanding this properly because when I do this, I get a 5' end that needs to be rejoined with another 5' end, and likewise with the 3' end: Original: 5'-TCTCGCATGGTAGGT-3' Taking out sequence which needs to be inverted: 5'-GCATGGT-3' Invert: 3'-TGGTACG-5' Inverted sequence:5'-TCTC-3' (3'-TGGTACG-5') 5'-AGGT-3' ...so I don't see how I can rejoin the inverted segment. I feel like I'm missing something obvious, if someone could help me out with this it would be great.