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 Tools    >> Seqlogos

Plea for Support
If you have found this resource useful for your research, please, tell about it to the SECRETARIA GENERAL DE CIENCIA, TECNOLOGIA E INNOVACION OF SPAIN (sgcti@mineco.es, dgi@mineco.es).Your support will be crucial to keep it up and running. Thanks.
Description: SeqLogos generates sequences logos from amino acid sequence alignment. Sequences logos are useful tools to visualyze sequence patterns and represent a more informative alternative to consesus sequence.
1. INPUT NAME (optional)
2. PROTEIN SEQUENCE ALIGNMENT (ClustalW or GCG format):
Paste sequence
Or, upload sequence
3. OPTIONS
Logo Type Background amino acid distribution
Type 1

Type 2
Equal Distribution (0.05)
Custom: Enter amino acid probabilities
pA pC pD pE pF pG pH pI pK pL pM pN pP pQ pR pS pT pV pW pY


Server uses the DALILA package to create sequence logos from input files derived from sequence alignments using a perl script implemented by Pedro A. Reche. Perl script uses the method of J. Gorodkin et al. Comput. Appl. Biosci., Vol. 13, no. 6 pp 583-586, 1997 in which the standard sequence logo by Schneider and Stephens have been modify to take in consideration a priori amino acid distributions as well as gaps. When a priori aa probabilities are all set to 0.05 sequence logo is virtually identical to that described by Tom Schneiders
Hits since June/2004 Last updated:
Praises and Complaints: Pedro Reche
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