Clonal Selection


 

 

 

 

 

 

 

 

Lymphocyte clones

 

 

 

Anti-A

Anti-B

Anti-C

 

 

 

 

 

 

 1° Ag contact 

 

 

 

 

 

Proliferation stage

 

 

 

 

 

 

 

 

Differentiation stage

Plasma cells

Memory cells

 

 2° Ag contact

Effector cells produce
anti-A antibody

 

 

 

 

 

 

 

 

 

   

   

   

   

 

 

Effector cells produce anti-A antibody

Memory cells remain