Fig. 2

Alu and 3′-end stem-loop secondary structure for AluYa5 active element. a Alu secondary structure. Alu is composed from two monomers of 7SL RNA. Each monomer has two short stem-loops connected with U-turn at the 5′-domain and a long stem-loop with bulges at the 3′-domain. 3′-end sequence that can form stem-loop is highlighted in blue. b Alu 3′-end stem-loop structure from the sequence highlighted in blue in the section (A)