The U-turn is found in the anticodon and T loops of tRNA as shown above. Residues 33, 34, 35 are from the anticodon loop, 55, 56, and 57 are in the T loop of tRNA. The U-turn is also found at the active site of the hammerhead ribozyme.

tRNA structure.
Hammerhead Ribozyme
Nucleotide numbering help.
Back to intro to DNA-RNA structure.