Seven teams have won the NCAA tournament without a single defeat to mar their records. Their stories include some of the most storied names in basketball history: Bill Russell. Frank McGuire. Lew Alcindor, John Wooden, Bob Knight... these teams finished perfect seasons by taking home an NCAA championship. It is worth noting, though -- all of these teams turned the trick before the tournament field expanded to 64 teams in 1985. Bill Russell was one of the future NBA stars that led USF during their winning streak.
Each antibody binds to a specific antigen; an interaction similar to a lock and key. An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shape protein produced by plasma cells that is used by the immune system to identify and neutralize pathogens such as bacteria and viruses.The antibody recognizes a unique molecule of the harmful agent, called an antigen, via the variable region.his region is known as the hypervariable region. Each of these variants can bind to a different antigen. This enormous diversity of antibody paratopes on the antigen-binding fragments allows the immune system to recognize an equally wide variety of antigens.
Antibodies (also known as immunoglobulins, abbreviated Ig) are gamma globulin proteins that are found in blood or other bodily fluids of vertebrates, and are used by the immune system to identify and neutralize foreign objects, such as bacteria and viruses.ntibodies are produced by a kind of white blood cell called a plasma cell. There are several different types of antibody heavy chains, and several different kinds of antibodies, which are grouped into different isotypes based on which heavy chain they possess.