User:Ytrusova/sandbox

 UNCG 

In the UNCG tetraloop, the N could be either Uracil, Adenine, Cytosine, or Guanine. This tetraloop is favorable both thermodynamically and structurally due to hydrogen bonding. van der Waals interactions, coulombic interactions and the interactions between the RNA and the solvent. The UNCG tetraloops are more stable than DNA loops with the same sequence.The UUCG tetraloop is the most stable tetraloop. UUCG and GNRA tetraloops make up 70 % of all tetraloops in 16S-RNA .