CGSC DB-WebServer:
Access To and Information About All Query Forms.

Notice 1/1/2024-- The CGSC at Yale has been discontinued, Strains from the CGSC collection are now available from the E. coli Genetic Resource Center. Questions and correspondence should be directed to

Links and lists of commonly requested and searched for strains

TO REQUEST STRAINS or additional information, email us at or see our other contact information. When requesting strains please include the shipping address and the name of the Primary Investigator of the laboratory. A description of the charges for strains can be found here.

INFORMATION ON HOW STRAINS ARE SHIPPED A description of our shipping methods and instructions on how to revive strains can be found here.

Note: The CGSC Collection contains only non-pathogenic BSL-1 laboratory strains, primarily genetic derivatives of Escherichia coli K-12, the laboratory strain widely used in genetic and molecular studies. For details, see About CGSC in the navigation bar on the left.

The CGSC Database of E. coli genetic information includes genotypes and reference information for the strains in the CGSC collection, the names, synonyms, properties, and map position for genes, gene product information, and information on specific mutations and references to primary literature. The public version of the database includes this information and can be queried directly via this CGSC DB WebServer. For help, use the help links located above and on each query form, or contact us directly.