> For the complete documentation index, see [llms.txt](https://help.connected.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.connected.illumina.com/ora/product-guides/dragen-ora-helper-suite/files-compressed-with-other-reference.md).

# Handling of fastq.ora files compressed with reference other than default human reference

With DRAGEN v4.3, compression of FASTQ files derived from supported non-human species and from human bisulfite data (methylated DNA application) is available. DRAGEN ORA Helper Suite allows for transparent handling of such files, providing the correct reference has been downloaded and is available locally. Refer to the sections [Install the DRAGEN ORA Decompression References](/ora/product-guides/dragen-ora-helper-suite/installation.md) and [Supported References](/ora/reference/supported-references.md).

The command `orahelper <file.fastq.ora>` provides information on:

* which reference has been used to compress
* the steps to follow to install the correct reference. Note: the default human reference refbin is installed by default with the Software and does not need to be downloaded again.


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