Figure 6From: Lineage specific evolution of the VNTR composite retrotransposon central domain and its role in retrotransposition of gibbon LAVA elementsVNTR remodeling at the DNA level. (A) Comparison of the repeat unit schemata of orthologous SVA_D elements in human and chimpanzee. D11 to D20 are generic identifiers. The genomic positions of the elements are provided in Additional file 1. Repeat unit arrays detailed in B, C and D are highlighted in grey. A likely duplication in the human D15 ortholog is marked with an arrow. HSA – Homo sapiens; PTR – Pan troglodytes. (B) and (C) represent examples of indels resulting from a microhomology-driven mechanism. Repeat units are separated by dashes; microhomologies are highlighted in grey. Note that in (C) identity within the microhomology is not 100% - likely due to divergent sequence evolution in the two species. BP – breakpoint (D) shows an example of repeat unit conversion resulting from small scale insertion/deletion. The complete pairwise alignments for all ten elements analyzed are provided in Additional file 1: Figure S5.Back to article page