@article {38180,
	title = {copia-like retrotransposons are ubiquitous among plants},
	journal = {Proc Natl Acad Sci USAProc Natl Acad Sci USA},
	volume = {89},
	year = {1992},
	abstract = {Transposable genetic elements are assumed to be a feature of all eukaryotic genomes. Their identification, however, has largely been haphazard, limited principally to organisms subjected to molecular or genetic scrutiny. We assessed the phylogenetic distribution of copia-like retrotransposons, a class of transposable element that proliferates by reverse transcription, using a polymerase chain reaction assay designed to detect copia-like element reverse transcriptase sequences. copia-like retrotransposons were identified in 64 plant species as well as the photosynthetic protist Volvox carteri. The plant species included representatives from 9 of 10 plant divisions, including bryophytes, lycopods, ferns, gymnosperms, and angiosperms. DNA sequence analysis of 29 cloned PCR products and of a maize retrotransposon cDNA confirmed the identity of these sequences as copia-like reverse transcriptase sequences, thereby demonstrating that this class of retrotransposons is a ubiquitous component of plant genomes.},
	author = {Voytas, D. F. and Michael P. Cummings and Koniczny, A. and Ausubel, F. M. and Rodermel, S. R.}
}
