Unformatted text preview: bacteria, but special techniques are used because the bacteria do not usually produce human proteins. Therapeutic proteins produced by biotechnology include a clot-dissolving protein called tissue plasminogen activator (TPA) and interferon. This antiviral protein is produced within E. coli cells. Interferon is currently used against certain types of cancers and for certain skin conditions. Vaccines represent another application of recombinant DNA technology. For instance, the hepatitis B vaccine now in use is composed of viral protein manufactured by yeast cells, which have been recombined with viral genes. The vaccine is safe because it contains no viral particles. Experimental vaccines against AIDS are being produced in the same way....
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- Fall '07