DAVID PARKER / SCIENCE PHOTO LIBRARY DAVID PARKER / SCIENCE PHOTO LIBRARY
Plant vaccine for AIDS. Researcher uses a glass loop to spread and grow recombinant bacteria on agar in a petri dish. This is research to produce a plant vaccine for AIDS, conducted at the John Innes Institute in Norwich, England. Here the bacteria contain recombinant DNA, being cloned before this genetic material is introduced into cowpea plant viruses. The cowpea plant is prone to infection by cowpea mosaic virus (CPMV). First, bacteria are used to clone a gene from the HIV virus (the virus causing AIDS), which is inserted into the CPMV virus. By infecting cowpea leaves with this altered CPMV virus, an AIDS vaccine of virus particles is produced by the plant.
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