Without doubt, the PGA European Tour is the second most important tour in menâs golf, behind the PGA Tour. When it comes to prize money, its harder to predict the European Tourâs standing in comparison to the PGA Tour, and whether it has fallen or risen in the past few years.
An antigen is a molecule that binds to Ag-specific receptors, but cannot necessarily induce an immune response in the body by itself. Antigens are usually peptides, polysaccharides or lipids.
Antigen: 1  a 'hook' or 'gate' on cell surface. 2  exists on the surface of most cells. 3  controls what goes in and out of a cell. 4  regulates inner functions of cell, whilst protecting interior. 5  exists due to random mutations - complex in structure.