  In this work we present a new application that is being developed. PhyloGrid
is able to perform large-scale phylogenetic calculations as those that have
been made for estimating the phylogeny of all the sequences already stored in
the public NCBI database. The further analysis has been focused on checking the
origin of the HIV-1 disease by means of a huge number of sequences that sum up
to 2900 taxa. Such a study has been able to be done by the implementation of a
workflow in Taverna.
