ID Converter
PIR	http://www.proteininformationresource.org/pirwww/search/idmapping.shtml
Uniprot ID converter	http://www.uniprot.org/mapping/
gProfiler	http://biit.cs.ut.ee/gprofiler/gconvert.cgi
Biomart	http://www.ensembl.org/biomart/martview/171f8a3dbc3a304dd82bb9ea4551920d