The 2,2 loop has been a tough structure to get right in the lab. I wanted to make a list and call it "successful 2,2 loops", but, as I looked through the designs, I couldn't find any that are truly successful. So I'm making a list of the closest. Brourd's is the only one that has all 4 loop nucleotides unbonded. I added the other three, even though they have blue in the loop (in the experimental data view) because the blue is a lot lighter than in most designs. Otherwise it would've been a VERY short list.