> For the complete documentation index, see [llms.txt](https://documentation.panomics.bio/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.panomics.bio/documentation/analyses/analysis-workbench/marker-genes.md).

# Marker Genes

This module is similar to [Gene Expression](/documentation/analyses/analysis-workbench/gene-expression.md), in the sense that it is used for plotting gene expression while grouping by an observation. However, there are several distinctions.

1. Plots a heatmap and individual violin plots for each gene.
2. Does not compute pseudobulk for single-cell data. 
3. Allows for grouping by any dataset observation, not just org-level metadata fields.
4. Requires a [standard runtime](/documentation/compute-runtimes/codeless-compute.md).

A typical use case is plotting cell type marker genes across Leiden clusters to annotate cells.

## Video demonstration