General term for a protein without its characteristic prosthetic group, which may be a metal or a small organic compound; for example, the protein apotransferrin combines with iron to form transferrin, and protein apoceruloplasmin combines with copper to form the enzyme ceruloplasmin.
Specific combination of genes within a cell or cells
Group of proteins present on the surface of white blood cells (leukocytes) and other nucleated cells (containing a nucleus). These proteins help the body’s immune system to identify its own cells and to distinguish between “self” and “nonself.” Each person has an inherited combination of HLA antigens and, while not as unique as a fingerprint, the...
1) Substance that has a hydroxyl (OH) ion, tastes bitter, has a pH greater than 7 and, when combined with an acid, forms a salt; example of a base is ammonia 2) One of the building blocks of DNA and RNA
Any of a group of fats and fat-like substances, including oils, waxes, steroids, and triglycerides. Lipids are easily stored in the body, and triglycerides serve as a fuel source. Some (such as cholesterol and phospholipids) are an important constituent of cell structures and are involved in many biological functions. Lipids can combine with other...