. . . . . . . . . . . . "a(SCHEM:Tretinoin) -> r(MGI:Gna13)" . "Approximately 61,000 statements." . "Copyright (c) 2011-2012, Selventa. All rights reserved." . "BEL Framework Large Corpus Document" . . "20131211" . "In contrast, ATRA induces P19 mouse embryonic carcinoma cells to differentiate to endoderm by up-regulating expression of Galpha12 and Galpha13" . . "Selventa" . . . . "2014-07-03T14:34:19.032+02:00"^^ . . .