KENNETH EWARD / BIOGRAFX / SCIENCE PHOTO LIBRARY KENNETH EWARD / BIOGRAFX / SCIENCE PHOTO LIBRARY
HIV therapy. Computer artwork illustrating the potential of short interfering RNA (siRNA) sequences to block human immunodeficiency virus (HIV) infection. CD4 gene, which normally expresses a cell surface receptor used by HIV to gain access to a cell, by about 75%. This effectivly prevents infection.
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