Figure 1.
5′-Target site duplications (TSD) for various human L1 elements as previously analyzed and annotated by Goodier et al. (2000) and Pickeral et al. (2000). Accession numbers of the GenBank entries harboring the L1 element are given on the left. Only the TSDs upstream of the L1 elements are shown. The annotated TSD 3′-ends are further separated by a /. Note that a more stringent majority-rule consensus sequence defines the L1 start sequence as 5′-GGAGGA...-3′ (see text).
