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The Manually Annotated AlternativelySpliced Events (MAASE) database system is a unique alternative splicing information resource designed specifically with experimentalists in mind. MAASE is an online resource for convenient access, identification, and annotation of alternative splicing events (ASEs). MAASE consists of two components: an annotation system and a curated database. The annotation system is a web-based workspace that combines manual and computational approaches to identifying and annotating ASEs, a combination that is vital if a comprehensive collection is to be obtained. MAASE annotated ASEs are deposited into the database component, which can either be queried one entry at a time or multiple entries at a time with convenient access to alternatively spliced junction sequences as well as surrounding sequences to facilitate the design of microarray experiments.
Quick Search

Quick search allows you to conveniently search for individual gene entries by keyword (ie ... gene name, protein name).

Advance Search

Advance search provides greater query flexibility as well as the option to retrieve individual gene entries or all alternative splice event information from multiple genes.

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Please sign in before annotating alternative splicing events.

Database Contents

Contains information on current database contents.

Annotate ASEs

Place of entry to use the MAASE annotation system to annotate alternative splicing events (ASEs).


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