Copyright information:Taken from "Molecular archeology of L1 insertions in the human genome"Genome Biology 2002;3(10):research0052.1-research0052.18.Published online 19 Sep 2002PMCID:PMC134481.Copyright © 2002 Szak et al., licensee BioMed Central Ltd The L1 start positions of the 16,266 elements with TSDs were placed into 50-nucleotide bins. The schematic of L1 along the axis indicates the L1 start position represented by each bin. The axis shows the number found in each bin.