RNA base pair that does not follow Watson-Crick base pair rules; guanine–uracil (G-U), hypoxanthine–uracil (I-U), hypoxanthine–adenine (I-A), or hypoxanthine–cytosine (I-C)
RNA base pair that does not follow Watson-Crick base pair rules; guanine–uracil (G-U), hypoxanthine–uracil (I-U), hypoxanthine–adenine (I-A), or hypoxanthine–cytosine (I-C) (en)