> 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/ampliseq-library-prep/library-preparation-ampliseq-library-prep-reference_material-list/000002333.md).

# Plate layouts for Ampliseq Combinatorial Dual (CD) Indexes Sets A, B, C and D

The following table shows the plate layout for AmpliSeq CD Indexes Sets A, B, C and D. The catalog numbers for these index kits are 20019105 (Set A), 20019106 (Set B), 20019107 (Set C), and 20019167 (Set D).

**AmpliSeq CD Indexes Set A for Illumina**\
![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-cddeb09fab9f0b030055c3226de468d97f49823f%2Fimage1.jpg?alt=media)

**AmpliSeq CD Indexes Set B for Illumina**\
![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-a3fcd711f1542e05461f014bb25699bef41d0dcc%2Fimage2.jpg?alt=media)

**AmpliSeq CD Indexes Set C for Illumina**\
![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-b166600e0c43f8c68290913f1f6abff438b20f3d%2Fimage3.jpg?alt=media)

**AmpliSeq CD Indexes Set D for Illumina**\
![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-c5d1970fd81d367f6172a78d97b05ca12864f0d6%2Fimage4.jpg?alt=media)

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.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #2333), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000002333%20-%20Library%20Preparation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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