. . . . . . . . . . . . . . . . "p(HGNC:CD28) -| cat(p(HGNC:CDKN1B))" . "Approximately 61,000 statements." . "Copyright (c) 2011-2012, Selventa. All rights reserved." . "BEL Framework Large Corpus Document" . . "20131211" . "CD28 costimulation was shown to directly regulate T-cell cycle entry and progression through the G1 phase in an IL2-independent manner by downregulation of the cdk inhibitor p27kip1" . . "Selventa" . . . . "2014-07-03T14:31:49.750+02:00"^^ . . .