> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/library-preparation/index-kits/library-preparation-index-kits-reference_material-list/000002337.md).
# Plate layout for IDT for Illumina - TruSeq Unique Dual (UD) indexes v2
The following table shows the plate layout for IDT for Illumina - TruSeq DNA UD Indexes v2 (96 Indexes, 96 Samples), catalog number 20040870, and the IDT for Illumina - TruSeq RNA UD Indexes v2 (96 Indexes, 96 Samples), catalog number 20040871.
The Index Adapters Pooling Guide, linked [here](https://support.illumina.com/downloads/index-adapters-pooling-guide-1000000041074.html), contains this table along with recommended index combinations for low-plexity library pooling. Some of the indexes are versioned (UDI0015v2, UDI0016v2, UDI0055v2 and UDI0056v2; not indicated in the above table), see the [Illumina Adapter Sequences document](https://support-docs.illumina.com/SHARE/AdapterSequences/Content/UDIndexes.htm) for more information and for the index sequences for each index pair.
**Note**: The orange boxing in the images above illustrates possible low-plex pooling options. See the Index Adapters Pooling Guide, linked above, for more information.
\
\
\
| |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| *For any feedback or questions regarding this article (Illumina Knowledge Article #2337), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000002337%20-%20Library%20Preparation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## 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, and the optional `goal` query parameter:
```
GET https://knowledge.illumina.com/library-preparation/index-kits/library-preparation-index-kits-reference_material-list/000002337.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
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.