1 Most of these diseases are infections, caused by a variety of bacteria, viruses, and parasites that can be foodborne. 2  Other diseases are poisonings, caused by harmful toxins or chemicals that have contaminated the food, for example, poisonous mushrooms.
(cluster designation 4) symbol for a glycoprotein expressed on the surface of helper T lymphocytes and other immune cells. CD4 serves as a receptor for human immunodeficiency virus envelope glycoprotein gp120.
The gp120 exterior envelope glycoprotein binds the CD4 glycoprotein on target cells, which triggers conformational changes in gp120 that allow binding to one of two chemokine receptors, CCR5 or CXCR4 6, 7, 8, 9, 10, 11 and 12.