In the manuscript entitled “In Vitro Induction of Specific Unresponsiveness against the 2,4,6-Trinitrophenyl Determinant: I. The Induction of Unresponsiveness” by Doctors Kettman and Lesley, Journal of Immunology, Volume 112, page 1139, March 1974, POL should be changed to PLL, which is the abbreviation in this paper for poly-l-lysine.

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