# Index and UMI information for the Illumina miRNA prep kit

**What are the sequences of the indexes?**

* This kit uses indexes that are unique to this library prep kit: Illumina miRNA UD Indexes. Sequences can be found in the [Adapter Sequences Document](https://support.illumina.com/downloads/illumina-adapter-sequences-document-1000000002694.html). Illumina sells 4 x 96 plates: A, B, C, D.
* Note: Other Illumina index sets, including the Illumina DNA/RNA UD Indexes (v3) indexes, are not compatible with the Illumina miRNA library prep kit.

**Are the UMI random? If not, are the sequences available?**

* UMIs are random, therefore sequences are not provided.

\
\
\ <br>

|                                                                                                                                                                                                                                                                                                                                                                              |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| *For any feedback or questions regarding this article (Illumina Knowledge Article #9893), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000009893%20-%20Library%20Preparation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


---

# 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://knowledge.illumina.com/library-preparation/rna-library-prep/library-preparation-rna-library-prep-faq-list/000009893.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.