Human immunodeficiency retrovirus known has HIV causes AIDS. HIV consists of outer biolipid envelope taken from infected cells plasma membrane with protruding GP 120 Receptor. Inside a protein coats surrounds the cone shaped viral coat containing two identical positive strands of RNA and enzyme called reverse Transcriptase.Upon entrance into the blood stream these virus attach to any cell that has CD4 receptors such has those found in T4cells also known has helper cells, GP120 receptor on the viral outer envelope attach to the CD4 molecule on the plasma membrane of the T4 membrane.
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