Sheared A(anti)-A(anti) Pairs in a Destabilizing 2x2 Internal Loop: The NMR Structure of 5'(rGGCAAGCCU)2 - Znosko, B. M.; Burkard, M. E.; Schroeder, S. J.; Krugh, T. R.; Turner, D. H. (Biological Magnetic Resonance Bank, 2002)