1. EcoliHouse: A Publicly Queryable Warehouse of E. coli K12 Databases. http://www.porteco.org/. EcoliHouse: A Publicly Queryable Warehouse of E. coli K12 Databases. http://www.porteco.org/.
2. PubChem- Database of Chemical Molecules. https://pubchem.ncbi.nlm.nih.gov. PubChem- Database of Chemical Molecules. https://pubchem.ncbi.nlm.nih.gov.
3. The Universal Protein Resource Databases (UniProt) . http://www.ebi.ac.uk/uniprot/. The Universal Protein Resource Databases (UniProt) . http://www.ebi.ac.uk/uniprot/.
4. WordNet: Lexical Database. . http://wordnet.princeton.edu/. WordNet: Lexical Database. . http://wordnet.princeton.edu/.