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.
A: Glycoproteins provide many functions: they give structural support to cells, help to form connective tissues and facilitate digestion by producing secretions and mucous in the gastrointestinal tract. Glycoproteins are handy cell components and are found in many places within cells.