What shape is antibody?
Antibodies are generally expressed in the shape of a Y.
Each is made up of 2 heavy chains and 2 light chains. An antibody is made up of a variable region and a constant region, and the region that changes to various structures depending on differences in antigens is called the variable region, and the region that has a constant structure is called the constant region.
The variable region forms diversity in antibodies to enable them to respond to a variety of antigens.
heavy chain constant regions are classified into 5 types (isotypes) depending on differences in structure.