20,010 human genes · 3,229 species · 6 kingdoms

Single-Gene & Function Lookup Tool

Look up any of the 20,010 human protein-coding genes, 2,215 gene families, or 132 biological functions to view its tissue expression and presence across 3,229 species.

Loading gene catalog…

Unpacking gene, species, family, function, and expression records.

Find a gene, family, or function

Search a symbol or full name. Family and function searches open a filtered gene list.

Use ↑ and ↓ to choose a result, then press Enter.

Example genes

Selected human gene

Reference links open external gene records. NCBI is searched by human gene symbol.

Species conservation

Strong matchWeak matchAbsent

Strong means a high-confidence or multi-source catalog match; it does not establish a one-to-one relationship for every gene. Weak means a single-source or lower-confidence match. Absent means no match in this catalog, not proven biological absence.

Human tissue expression

Expression across 16 organ systems, with the catalog’s peak tissue measurement.

Organ tiles show the catalog’s expression flag, not an expression amount. TPM is available for the peak tissue only. Tau ranges from 0 (broad expression) to 1 (tissue restricted); labels here use ≥ 0.75 for tissue-specific and ≥ 0.4 for moderate.

HGNC gene families

Select a family to list all cataloged sibling genes.

GO Slim functions

Catalog categories containing this gene, grouped by annotation type.

Presence across kingdoms and taxonomic groups

Every percentage uses the number of species in its own row as the denominator.

StrongWeakAbsent

6 kingdoms

Kingdom	Species	Match distribution	Strong	Weak	Absent

29 taxonomic groups

Taxonomic group	Species	Match distribution	Strong	Weak	Absent

Species lookup

Inspect the active gene in all 3,229 species, including the human reference.

Species name or TaxIDMatch statusKingdomTaxonomic groupSource tier

Species	Kingdom	Taxonomic group	Tier	Match status	TaxID

Catalog version . Species coverage and annotations reflect this dataset. Gene conservation alone does not establish identical function, anatomy, or medical significance.