However, it is surprising that the same pattern of low activity, followed by a more recent burst of activity, is shared by three unrelated superfamilies (hAT, Mariner, and Helitron).
Our results show no such correlations; larger salamander genomes show no consistent pattern of having more frequent, or more recent, proliferation bursts.
Two major concomitant LINE/SINE amplifications were detected in opossum (in addition to a more recent LTR burst) and one in the platypus.
To test whether such differences reflect any aspect(s) of TE proliferation dynamics, we tested whether larger genomes showed evidence of either 1) more recent or 2) more frequent bursts of proliferation than smaller genomes by comparing the shapes of the element age distributions across taxa.
Japan's economy stagnated in the 1990s after its stockmarket and property bubbles burst, but its more recent economic performance looks even more troubling.
More recent work exhaustively catalogued every possible bifurcation type leading to burst firing [15].
In the human genome, one major ancient transposition burst, mainly involving LINEs, was detected, as well as a more recent important expansion of SINEs that was not associated with any concomitant increase in LINE copy number.
In a more recent epoch, the writers of Victorian England, fogged over with puritan fears and piqued perhaps by bursts of scientific revelations, contemplated civilization's fall to plague, beast and Martian.
In general the molecular clock rate tends to be greater during evolutionary bursts or radiations (if these involve frequent population subdivision [ 165]) and along more recent lineages, than those in the deeper past, because in more recent lineages mutations may be present which, given sufficient time, will be removed by drift [ 166, 167].
For recent bursts, where the mean number of substitutions per element is zero, the exponential is more appropriate.
