B7-1 and B7-2 do not deliver identical costimulatory signals, since B7-2 but not B7-1 preferentially costimulates the initial production of IL-4.
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J. Gribben | G. Freeman | G. Gray | L. Nadler | V. Boussiotis | P. Rennert | X. Ke | A. Anumanthan | G. M. Bernstein | Xiao Yen Ke | John G. Grlbben | G. Freeman | Gregory M. Bernstein