Table 4.

Numbers of different types of terms in the BioLexicon

Semantic Type	No. of Entries	No. of Variants	Semantic Type	No. of Entries	No. of Variants
Gene/Protein	1,640,608	1,408,312	Diseases	19,457	11,314
Chemicals	19,637	77,475	Molecular Roles	8,850	29,831
Organisms	482,992	182,610	Cell	842	512
Enzymes	4,016	4,164	Transcription Factors	160	129
Protein Domains	16,940	15,412	Operons	2,672	368
Protein Complex	2,104	418	Sequences	1,431	741

For each type entity, the total number of entries is shown, together with the total number of variant terms identified.