Fig. 1From: LDLR gene rearrangements in Czech FH patients likely arise from one mutational eventThe structure of an Alu element. One Alu element is about 300 bps long and consists of two monomers separated by a short A-rich sequence. The left monomer contains a bipartite RNA polymerase III promoter, composed of an A and a B box. The right monomer contains an insertion, rendering it 31 bps longer than the left monomer, and ends with a poly-A tail [16]Back to article page