1.An antigen is injected into a mouse
2.The mouse naturally produces lymphocytes, which produce antibodies specific to the antigen
3.Spleen cells which produce the lymphocytes are removed during a small operation.
4.The spleen cells are fused with human cancerous white blood cells called myeloma cells to form hybridoma cells which divide indefinitely and are grown in a laboratory.
5.These hybridoma cells divide and produce millions of monoclonal antibodies specific to the original antigen which are then collected