# Page Not Found

The URL `files/4TeV6SWhBHviWO4z8KjI` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [2.Conservation Analysis](https://book.ncrnalab.org/teaching/part-ii.-basic-analyses/2.conservation-analysis.md)
- [Appendix III. How to Backup](https://book.ncrnalab.org/teaching/appendix/appendix-iii.-how-to-backup.md)
- [Appendix V. Software and Tools](https://book.ncrnalab.org/teaching/appendix/appendix-v.-software-and-tools.md)
- [5.RNA Network](https://book.ncrnalab.org/teaching/part-iii.-ngs-data-analyses/5.rna-network.md)
- [4.2.Structure Motif](https://book.ncrnalab.org/teaching/part-iii.-ngs-data-analyses/4.motif/structure_motif.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://book.ncrnalab.org/teaching/part-ii.-basic-analyses/2.conservation-analysis.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.

### Option 2 — Browse the documentation index

Full index: https://book.ncrnalab.org/teaching/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://book.ncrnalab.org/teaching/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/teaching/part-ii.-basic-analyses/2.conservation-analysis.md`).

You may also use `Accept: text/markdown` header for content negotiation.