. . . . . . . . . . . . "a(SCHEM:Tretinoin) -| p(HGNC:RB1,pmod(P))" . "Approximately 61,000 statements." . "Copyright (c) 2011-2012, Selventa. All rights reserved." . "BEL Framework Large Corpus Document" . . "1.4" . "Using the estrogen receptor-negative, retinoid receptor-positive breast cancer cell line SKRB-3, we found that treatment with ATRA significantly decreased the expression of PKCalpha, as well as reducing ERK MAPK phosphorylation. ATRA treatment leads to dephosphorylation of Rb, and consequently to G(1) arrest" . . "Selventa" . . . . "2014-07-03T14:30:17.889+02:00"^^ . . .