What are the differences between constant / variable regions of antibodies?
The constant regions of antibodies are: The regions at the carboxyterminal of the light (carboxyterminal 1/2) and heavy (carboxyterminal 3/4) chains. They have constant sequence of amino acids in all the antibodies belonging to the same type. They are not the antigen binding sites. The variable regions are: The N terminal regions of the light (N-terminal 1/2) and heavy (N-terminal 1/4) chains. different in amino acids sequence from antibody to another antibody (specific to Antigen). They are the antigen binding sites so they must be variable from one antibody to another so a single antibody binds to a single antigen not to any other antigen. Q9. What are the differences between A:The primary immune response is the response to the antigen when the body is exposed to it for the first time. It is slow (about one week) and formed mainly of IgM. The secondary immune response is the response to the same antigen for the second time. This time it is quick (about 3 days) and amplified (100 – 10
