what are antibodies made of? - verified answers-4 polypeptide chains -- 2 heavy, 2 light



what are the two regions an antigen is made of? - verified answers-- variable

- constant



what is special about the variable region? - verified answers-complementary and specific to an antigen



what are the chains bonded by? - verified answers-disulphide bridge



why do antibodies have a hinge region? - verified answers-to allow the antibody to move to bind to more than one antigen