The given identifiers can be mapped to protein (UniProtKB) or gene (Entrez) identifiers.
If the given list of identifiers correspond to genes, it is advisable select "Entrez gene"
in the dropbox. Otherwise the number of mapped identifiers will be larger than the original list due to the
one-to-many relationship between gene and protein identifiers. Furthermore, pseudo genes and
micro RNA genes will not map to any protein.