title: trimAl: a tool for automated alignment trimming in large-scale phylogenetic analyses.
abstract: CONCLUSIONS
  Multiple sequence alignments are central to many areas of bioinformatics. It has been shown that the removal of poorly aligned regions from an alignment increases the quality of subsequent analyses. Such an alignment trimming phase is complicated in large-scale phylogenetic analyses that deal with thousands of alignments. Here, we present trimAl, a tool for automated alignment trimming, which is especially suited for large-scale phylogenetic analyses. trimAl can consider several parameters, alone or in multiple combinations, for selecting the most reliable positions in the alignment. These include the proportion of sequences with a gap, the level of amino acid similarity and, if several alignments for the same set of sequences are provided, the level of consistency across different alignments. Moreover, trimAl can automatically select the parameters to be used in each specific alignment so that the signal-to-noise ratio is optimized.
  
  
  BACKGROUND
  trimAl has been written in C++, it is portable to all platforms. trimAl is freely available for download (http://trimal.cgenomics.org) and can be used online through the Phylemon web server (http://phylemon2.bioinfo.cipf.es/). Supplementary Material is available at http://trimal.cgenomics.org/publications.
authors.affiliation: Comparative Genomics Group, Bioinformatics and Genomics Programme, Centre for Genomic Regulation, 88 08003 Barcelona, Spain.
authors.forename: Salvador
authors.initials: S
authors.lastname: Capella-Gutiérrez
authors.forename: José M
authors.initials: JM
authors.lastname: Silla-Martínez
authors.forename: Toni
authors.initials: T
authors.lastname: Gabaldón
mesh_terms: D000465:Algorithms; D019295:Computational Biology / Q000379:methods*; D010802:Phylogeny; D016415:Sequence Alignment / Q000379:methods*; D020539:Sequence Analysis, Protein; D012984:Software; D014584:User-Computer Interface