Fig. 4

RNA secondary structures for 3′UTR stem-loops from different species. a L1 3′UTR stem-loop from human genome taken from 6 hottest L1 transposons reported as active in [2]. b L2 3′UTR stem-loop from eel experimentally reported as recognized by LINE-encoded RT [26]. c-d two L2 3′UTR stem-loops from zebrafish (ZfL2-1 and ZfL2-2) experimentally reported as recognized by LINE-encoded RT [40]. e R1 3′UTR stem-loop from silkworm experimentally reported as recognized by LINE-encoded RT [28]. f L1 3′UTR stem-loop from rat [49]. g L1 3′UTR stem-loop from maize (Malik, Burke et al. [45]). h R1 3′UTR stem-loop from mosquito (Malik, Burke et al. [45])