- Course overview
- Search within this course
- What is ArrayExpress?
- How are datasets submitted and stored in ArrayExpress?
- Experiment and sample information
- Files and download
- Next steps (towards data analysis)
- Summary
- Quiz: Check your learning
- Your feedback
- Learn more
- Get help and support on ArrayExpress
Refining your search
Most of the time you are interested in finding experiments matching certain criteria. Two options are available for searching and filtering the experiment list: the filter box and the search box (Figure 9).
The option you choose depends on what kind of criteria you would like to use to find experiments. The two methods can of course be combined. As a general rule, use the search box for attributes not listed in the filter box. For example, use the filters to select data sets from one species, and use the search box so specify the experimental variable(s) you are interested in (Figure 9).
![](https://www.ebi.ac.uk/training/online/courses/array-express-discover-functional-genomics-data-quickly-and-easily/wp-content/uploads/sites/72/2020/06/Slide11-1024x741.png)
Filter options
The filter box lets you select experiments by:
- species, e.g. only human material, or only Drosophila
- the type of analysed material: DNA, RNA, protein, metabolite
- technology type: microarray, sequencing, mass spectrometry
- array: the specific name of the array
Ticking the box “ArrayExpress data only” shows only curated experiments that were directly submitted to ArrayExpress.
Free-text search
In the free-text search box, you can enter keywords to start a query or enter an accession number (e.g. E-MTAB-3682) to go directly to the desired experiment page.
Put quotes around multiple keywords if you want to find experiments where these words are found next to each other e.g. “breast cancer“. Entering multiple words without quotes will retrieve experiments where both keywords are found but they are not necessarily adjacent e.g. mouse leukemia.
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