> For the complete documentation index, see [llms.txt](https://jiawei-li.gitbook.io/sapbase-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jiawei-li.gitbook.io/sapbase-user-guide/analysis/gene-expression.md).

# Gene Expression

**Powerful Sapindus gene expression query engine**