RT Journal Article SR Electronic T1 Specific T cell factors exist JF bioRxiv FD Cold Spring Harbor Laboratory SP 100024 DO 10.1101/100024 A1 Geoffrey W. Hoffmann A1 Reginald M. Gorczynski YR 2017 UL http://biorxiv.org/content/early/2017/01/13/100024.abstract AB The symmetrical immune network theory has been developed since 1975 and is based on the existence of specific T cell factors. The existence of specific T cell factors is controversial. We confirm the existence of these specific immune system components by demonstrating that a rigorous 1975 experiment by Takemori and Tada can be reproduced. We also briefly review how specific T cell factors play a role in the induction of specific tolerance and in the induction of immunity according to the symmetrical immune network theory.