Alternative Splicing Tool

A precise web tool for researchers to analyze alternative splicing, estimate PSI, and compare isoform usage across conditions.

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About This Tool

The tool analyzes alternative splicing by ingesting isoform-level counts or transcript abundances across samples. It computes PSI values for exon inclusion events and outputs per-event metrics that reveal isoform usage patterns.
Conceptually, the tool relies on a standard inclusion/exclusion model, supporting multi-isoform events, normalization, and species-specific annotations. It can compare conditions to identify differential splicing with delta PSI and simple heuristics, while maintaining reproducible workflows.
Beneficiaries include molecular biologists, computational biologists, and labs performing RNA-seq analysis or transcriptomics studies. Unique value lies in transparent calculations, auditable pipelines, and ready exportable reports compatible with downstream analyses.
Core features include PSI calculation, per-event reporting, event filtering, sample metadata handling, and export in CSV/JSON. Use cases span tissue-specific splicing, treatment response, and isoform switch investigations; the tool emphasizes robust validation and clear assumptions.

How to Use

  1. Provide inputs by uploading or pasting counts for samples, species, and annotation.
  2. Configure PSI calculation settings and normalization options.
  3. Run calculation to obtain PSI, inclusion/exclusion counts, and delta PSI.
  4. Review outputs; export reports or data tables.
  5. Interpret results with per-event summaries and visualizations.
How to use alternative splicing web tool

Frequently Asked Questions

Find Quick Answers

What inputs are required?
Inputs include per-sample isoform counts or transcript abundances, a gene or transcript reference, species, and a compatible annotation file. Optional metadata can drive filtering. Data may be provided as CSV/TSV; the tool normalizes counts before PSI computation.
How is PSI calculated?
PSI is computed as inclusion divided by the sum of inclusion and exclusion. The tool uses small smoothing to avoid division by zero, reports per-event PSI, and stores per-sample values for downstream delta PSI calculations.
Can I compare results across conditions?
Yes. The tool computes delta PSI between conditions for each event and provides basic confidence metrics or heuristic thresholds. It supports multi-condition comparisons by producing event-level summaries across user-selected condition groups.
What outputs are generated?
The tool exports per-event tables with PSI, inclusion/exclusion counts, delta PSI, and optional significance metrics. Outputs are provided in CSV, TSV, and JSON formats, plus summary reports suitable for downstream analyses.

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