The document discusses various databases that contain biological data including genes, proteins, genomes, protein domains, gene expression, interactions, pathways, and models. It mentions several specific databases such as GenBank, UniProt, PDB, SGD, TAIR, Ensembl, InParanoid, HomoloGene, COG, OrthoMCL, Entrez, eggNOG, TreeFam, CDD, Pfam, SMART, InterPro, SCOP, CATH, GEO, ArrayExpress, Cyclebase, BioGRID, DIP, IntAct, MINT, Prosite, ELM, Domino, Phospho.ELM, PhosPhAt, Phosida, CORUM,