7a3y A 13 NA URS00021ED8F9_32630 32630 gcagcucguccug ............. ............. RNA duplex with a cytosine bulge in complex with berberine; RNA-A chain A 7a3y B 12 NA URS00021ED8FF_32630 32630 caggauagcugc ............ ............ RNA duplex with a cytosine bulge in complex with berberine; RNA-A chain B