“…The binding preferences of RBPs depend not only on the RNA sequences but also on the structural features of these RBP binding sites [19] , [20] , [21] , [22] , [23] , [24] , [25] . For example, A G-rich internal loop in the lncRNA Braveheart is critical for binding to a zinc-finger protein CNBP, which is required for the cardiac specification in mice [26] .…”