摘要: Not too long ago, it was still a mystery how the immune system able to recognize infinite number of viruses, bacteria, and other parasites foreign elements. It thought that antigens served as template around which antibodies molded themselves gain complementary form. In 1955, Niels K. Jerne first suggest response selective rather than instructive, i e , has capacity synthesize billions different encountering antigen only increases production antibody makes best fit. Soon afterwards, Macfarlane Burnet David Talmage suggested each lymphocyte bears one particular receptor that, after encounter with antigen, divides start mass relevant antibody. Later, Susumu Tonegawa elucidated molecular mechanism generates enormous diversity antibodies, discovery genes coding for T cell (TCR) by Tak W. Mak revealed TCR is generated in similar way.