We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleAntigen-specific precursor frequency impacts T cell proliferation, differentiation, and requirement for costimulation.AuthorsFord ML; Koehn BH; Wagener ME; Jiang W; Gangappa S; Pearson TC; Larsen CPPublicationThe Journal of experimental medicine, 2007, Vol 204, Issue 2, p299ISSN0022-1007Publication typearticleDOI10.1084/jem.20062319