# Gene Expression Filtering

To filter with gene expression data, you can add a filter based on the tiles created in the Gene Expression tab or  use the “+ Add Filter” button in the Cohort Banner. 

## **These filters allow for:**

* Assessing impact of genes/ features and their expression levels
* Building Cohorts based on Gene Expression Level 

## **You Can Filter By:**

* Gene Symbol or Ensembl ID with Expression Level

## Adding Gene Expression Filters

1. Add in your dataset
2. Select "+ Add Filter"

<figure><img src="/files/T2A5yLXqhEYxdn8l5hA8" alt=""><figcaption></figcaption></figure>

3. Select Assays and then under Gene Expression, select “Features/ Expression”&#x20;

<figure><img src="/files/FSyGlPACByDb8ulzx24p" alt=""><figcaption></figcaption></figure>

4. Select the genes that you want as well as the expression range. Please note, for the Gene/ Feature value, you can select by Gene Symbol or the ENSEMBL ID.&#x20;

<figure><img src="/files/ADEVYBududfoPk7u8pNz" alt=""><figcaption></figcaption></figure>

## Supplemental Video for Gene Expression Tab and Filtering&#x20;

{% embed url="<https://youtu.be/PdPeuCp8dzM>" %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://academy.dnanexus.com/cohortbrowser/how-to-create-cohorts/gene-expression-filtering.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.