This web server performs a decomposition of a protein sequence into evolutionarily-related domains, based on the analysis of coevolutionary couplings between pairs of amino acid positions in a multiple sequence alignment. A detailed description of the algorithm is provided in Granata D, Ponzoni L, Micheletti C, Carnevale V, "From Sequence to Function: Coevolving Amino Acids Encode Structural and Functional Domains" , bioRxiv 109397; doi: https://doi.org/10.1101/109397.