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Cited by 624

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GUIDANCE: a web server for assessing alignment confidence scores

Open access
Penn, O., Privman, E., Ashkenazy, H., Landan, G., Graur, D., Pupko, T.·2010·Nucleic Acids Research

Abstract

Evaluating the accuracy of multiple sequence alignment (MSA) is critical for virtually every comparative sequence analysis that uses an MSA as input. Here we present the GUIDANCE web-server, a user-friendly, open access tool for the identification of unreliable alignment regions. The web-server accepts as input a set of unaligned sequences. The server aligns the sequences and provides a simple graphic visualization of the confidence score of each column, residue and sequence of an alignment, using a color-coding scheme. The method is generic and the user is allowed to choose the alignment algorithm (ClustalW, MAFFT and PRANK are supported) as well as any type of molecular sequences (nucleotide, protein or codon sequences). The server implements two different algorithms for evaluating confidence scores: (i) the heads-or-tails (HoT) method, which measures alignment uncertainty due to co-optimal solutions; (ii) the GUIDANCE method, which measures the robustness of the alignment to guide-tree uncertainty. The server projects the confidence scores onto the MSA and points to columns and sequences that are unreliably aligned. These can be automatically removed in preparation for downstream analyses. GUIDANCE is freely available for use at http://guidance.tau.ac.il.

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Metadata

Authors
Penn, O., Privman, E., Ashkenazy, H., Landan, G., Graur, D., & Pupko, T.
Venue
Nucleic Acids Research
Published
2010-05-23
Volume
38
Issue
Web Server
Pages
W23-W28
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W1996516710
Cited by
624
References
1
FWCI
9.45
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: GUIDANCE: a web server for assessing alignment confidence scores. https://app.cochat.ai/papers/10.1093/nar/gkq443
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Penn, O., Privman, E., Ashkenazy, H., Landan, G., Graur, D., & Pupko, T. (2010). GUIDANCE: a web server for assessing alignment confidence scores. Nucleic Acids Research. https://doi.org/10.1093/nar/gkq443

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