BioSpace: A site for biotech news, job postings, company profiles and everything biotech. www.biospace.com

International Society for Cell Therapy: A good discussion forum with lots and lots of exchanges concerning cryopreservation of cells. www.celltherapy.org

American Society for Histocompatibility and Immunogenetics: An entry point for the subject of HLA typing with good links to sequences and other resources, some of which are listed below. www.ashi-hla.org

International IMmunoGeneTics Project (IMGT) IMGT/HLA database: Sequence database for HLA alleles. www.ebi.ac.uk/imgt/hla

International Histocompatibility Working Group: Provides reference cells for HLA typing. Since the ASHI repository was closed, The International Cell and Gene Bank has been assembling reference cell lines and cloned HLA genes. www.ihwg.org

The Allele Frequency Net Database: A great way to look up the frequency of HLA alleles in different world populations. New Allele Frequency Database: www.allelefrequencies.net Middleton D, Menchaca L, Rood H, Komerofsky R. Tissue Antigens 2003, 61, 403-407.