Journal
NUCLEIC ACIDS RESEARCH
Volume 34, Issue -, Pages W708-W713Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nar/gkl263
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Identification of dispersed or interspersed repeats, most of which are derived from transposons, retrotransposons or retrovirus- like elements, is an important step in genome annotation. Software tools that compare genomic sequences with precompiled repeat reference libraries using sensitive similarity-based methods provide reliable means of finding the positions of fragments homologous to known repeats. However, their output is often incomplete and fragmented owing to the mutations ( nucleotide substitutions, deletions or insertions) that can result in considerable divergence from the reference sequence. Merging these fragments to identify the whole region that represents an ancient copy of a mobile element is challenging, particularly if the element is large and suffered multiple deletions or insertions. Here we report PLOTREP, a tool designed to post- process results obtained by sequence similarity search and merge fragments belonging to the same copy of a repeat. The software allows rapid visual inspection of the results using a dot- plot like graphical output. The web implementation of PLOTREP is available at http://bioinformatics.abc.hu/PLOTREP/.
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