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The purpose is to search for similar protein groups, i.e. protein groups:
The Dice coefficient is used to measure similarity (result ranges from 0 to 1).
It compares every protein groups of the first context with every protein groups of the second context.
Comparing two protein groups each other means:
This comparison is similar to the previous one: similarity measure and “best alignment”
Each context is compared with a “unique reference”. First of all, this reference is built from the identification union, i.e. the parent context.