Domain Transcriptomics Proteomics Metabonomics
Technology microarrays affinity arrays massspectrom. LC-MS, NMR
Are biomolecular
Yes Yes No Yes No
Biomolecular entity identifiers gene/transcript identifier, e.g., Ensembl protein identifier, e.g., Uniprot - metabolite identifier, e.g., HMDB or ChEBI -
Biomolecular entity characteristics sequence and annotation sequence and annotation m/z; probability; number of chrom. fraction chemical formula and annotation chemical shift (NMR) or m/z (LC-MS)
Measurement types expression value abundance level intensity Intensity
Basic assay unit hybridisation hybridisation spectrum of an LC fraction acquisition with a certain pulse programme (NMR); spectrum of a certain LC fraction (LC-MS)
Table 2: Key characteristics of transcriptomics, proteomics and metabonomics experiments.