Orthologous MAtrix

OMA (Orthologous MAtrix) is a database of orthologs extracted from available complete genomes.^[1][2] The orthology predictions of OMA are available in several forms:

• OMA Pairs: for a given gene, a list of predicted orthologs in other species is provided.
• OMA Groups: a set of genes across different species which are all orthologous.
• OMA Hierarchical Groups: the set of all genes that have evolved from a single ancestral gene in a given taxonomic range.
• OMA Genome Pair view: the list of all predicted orthologs between two species.

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OMA

Content
Description	orthology inference among 1000 complete genomes.
Contact
Laboratory	ETH Zurich
Authors	Christophe Dessimoz Adrian Schneider Adrian Altenhoff Gaston H. Gonnet
Primary citation	Altenhoff et al.[1]
Release date	2004
Access
Website	omabrowser.org
Download URL	http://omabrowser.org/All/download.html
Web service URL	wsdl
Miscellaneous
Data release frequency	2 releases per year

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