Table 2:

Examples of equivalent ways of expressing search queries in EB-eye, MRS, SRS and Entrez.

Search Engine	Query
EB-eye	(reductase OR transferase) AND glutathione
MRS	(reductase OR transferase) AND glutathione
SRS	[UNIPROT-all:(reductase|transferase)&glutathione]
Entrez	(reductase OR transferase) AND glutathione
EB-eye	gene_primary_name:(gst)
MRS	gn:gst
SRS	[UNIPROT-genename:gst]
Entrez	gst[Gene Name]
EB-eye	gene_primary_name:(gst*)
MRS	gn:gst*
SRS	[UNIPROT-genename:gst*]
Entrez	gst*[Gene Name]