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Examples: Entry HUMAN22169 - Entry P53_RAT - Search for "photoreceptor" - "Drosophila" species

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2,564

Full genomes

20,891,827

Proteins

1,189,306

OMA groups

898,285

Deepest HOGs

All.Nov2022

Release

First time here?

Introduction to OMA: See OMA in a nutshell (Introduction) in OMA doc.
Familiarise yourself with orthology basics: Swiss Orthology , Orthology benchmark.
Familiarise yourself with the different types of homologs in the OMA doc.
Get ideas about different types of analyses you could do with OMA.

OMA tools

Download options

Current release: All data is available for download in a variety of formats.
API: The OMA Browser now has a REST API !
Export All-All: Export a set of genomes and their precomputed all-against-all comparisons for OMA standalone.

Latest news

New blog post: OMA Browser Nov2022 is out: 29th release with 2564 species across all domains of life https://ift.tt/2btDCn5
New blog post: OMA Browser Dec2021 is out! 28th release with 2496 complete genomes https://ift.tt/3nMpWAN
New blog post: OMA Browser Apr2021 is out! 27th release with 2,424 genomes https://ift.tt/3f9v4Kh

Stay in touch

If you use OMA in your work, please consider citing:
Altenhoff A et al., OMA orthology in 2021: website overhaul, conserved isoforms, ancestral gene order and more Nucleic Acids Research, gka1007, (doi:10.1093/nar/gkaa1007)