>1N53_1|Chain A|RNA (5'-R(*GP*AP*GP*GP*GP*UP*GP*GP*AP*AP*CP*CP*GP*CP*GP*C)-3')|null GAGGGUGGAACCGCGC >1N53_2|Chain B|RNA (5'-R(*GP*CP*GP*UP*CP*CP*CP*UP*C)-3')|null GCGUCCCUC