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Provides a collection of over 100 000 protein families. FIGfams are sets of isofunctional homologues. Each one contains a set of proteins that are end-to-end homologous and share a common function and can be define as a fourtuple: ID, protein-set, decision-procedure and family-function. Results from the literature are incorporated into the FIGfams via Subsystem curation, guaranteeing that the FIGfams remain up to date.

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FIGfams classification

  • Archaebacteria
  • Eubacteria

FIGfams specifications

Restrictions to use:
Data access:
File download
Community driven:
User data submission:
Not allowed

FIGfams support


  • Folker Meyer <>

Additional information


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Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, USA; Computation Institute, University of Chicago/Argonne National Laboratory, Chicago, IL, USA; Fellowship for the Interpretation of Genomes, Burr Ridge, IL, USA

Funding source(s)

Supported by federal funds from the National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services, under Contract No. HHSN266200400042C and US Department of Energy contract DE-AC02-06CH11357.

Link to literature

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