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Trix Search

Carolina Monzó edited this page Dec 15, 2025 · 1 revision

The tool generates a Trix search index that enables powerful text-based search in the UCSC Genome Browser search box.

Basic Search

Search Term Description Example
isoform_id Search by exact isoform ID PB.1234.1
gene_name Search by associated gene BRCA1 or ENSG00000012048

Prefixed Search Terms

Use prefixed terms to filter by specific attributes:

Search Term Description Example
structural_category_X Filter by structural category structural_category_novel_in_catalog
strand_plus / strand_minus Filter by strand strand_plus
coding_coding / coding_non_coding Filter by coding status coding_coding
subcategory_X Filter by subcategory subcategory_mono-exon
bite_True / bite_False Filter by BITE status bite_True
predicted_NMD_True Filter by NMD prediction predicted_NMD_True
polyA_motif_found_True Filter by polyA motif polyA_motif_found_True
RTS_stage_True Filter by RTS stage RTS_stage_True
within_CAGE_peak_True Filter by CAGE peak within_CAGE_peak_True

Combining Search Terms

Combine multiple terms with spaces (AND logic):

structural_category_novel_in_catalog strand_plus coding_coding

This finds all novel_in_catalog isoforms on the plus strand that are coding.

Examples

Find all FSM isoforms for BRCA1:

BRCA1 structural_category_full-splice_match

Find all coding NIC isoforms on minus strand:

structural_category_novel_in_catalog strand_minus coding_coding

Find isoforms with predicted NMD:

predicted_NMD_True

Find mono-exon isoforms:

subcategory_mono-exon

Using the Generate Trix String Button

The HTML reports include a "Generate Trix String" button:

  1. Filter-based: Set your desired filters using dropdowns, then click "Generate Trix String"
  2. Row-based: Click on a specific isoform row to select it (highlighted in blue), then click "Generate Trix String"

The generated string can be copied directly into the UCSC Genome Browser search box.

Note: Range filters (e.g., 100:1000 for length) are not supported by Trix search and will be ignored.

Limitations

  • Trix search is text-based and does not support numeric ranges
  • Searches are case-insensitive
  • Partial matches work for gene names and isoform IDs
  • For complex filtering, use the track's built-in filters instead

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