Antigens

• what are antigens?

  specific proteins on the surface of cells that generate an immune response
• what are antigens used to identify?

  pathogens, non self material, toxins, and abnormal body cells
• what is antigen variability?

  the antigens change frequently due to genetic mutations
• how do cells of the immune system recognise pathogens ?

  antigens are used to detect pathogens and generate immune response

  lymphocytes bind to molecules called antigens which are specific to pathogen