Depends on its date. There are no rare JFK halves. You might get $4 from a dealer for a 1964 one because they're 90% silver, $1.50 for a 40% silver one minted from 1965 to 1 â¦ 970. Anything newer is copper-nickel and has no added value. 2 people found this useful.
An antibody, also known as an immunoglobulin, is a protein found in the blood or body fluid of an animal.These proteins have special receptors that allow them to bind to foreign substances known as antigens.Their purpose is to identify and neutralize antigens so that they cannot make the host organism sick.n antibody, also known as an immunoglobulin, is a protein found in the blood or body fluid of an animal.
Antibody. Protein that is produced by lymphocytes (white blood cells) and that attaches to a specific antigen. Antigen. Molecule on the surface of a pathogen that identifies it as a foreign invader to the immune system. Bacteria. Single-celled organism.Has a cell wall, cell membrane, cytoplasm.ymphocyte. A type of white blood cell that make antibodies to fight off infections. Pathogen. A micro-organism that causes disease. Phagocyte. Phagocytes are the white blood cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.