FUNCTIONAL GENETIC FOSSILS. “Nevertheless, there remain a few families of actively transposing human TEs; the active families of human TEs include Alu, L1 and SVA elements. All three of these active families of human TEs are retrotransposons that transpose via reverse transcription of an RNA intermediate.” (TE = transposable elements).
https://mobilednajournal.biomedcentral.com/articles/10.1186/s13100-015-0052-6