00337nam a2200121Ia 4500008004100000022001400041040001100055100002100066245003000087260007200117300001700189300000900206251112s9999||||xx |||||||||||||| ||und||  a0022-1767  aCNCLSA  aEthan M. Shevach 4aThe Journal of Immunology  cApril 1, 1992bThe American Association of ImmunologistsaBaltimore  aP. 1971-2974  bV.45