4v5q BJ 3.1 BS01 rna BA 0 X7 X33 X59 X80 X4 X30 X56 X77 21378964 6 ~ 2897 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA