sub:provenance {
  beldoc: dce:description "Approximately 61,000 statements." ;
    dce:rights "Copyright (c) 2011-2012, Selventa. All rights reserved." ;
    dce:title "BEL Framework Large Corpus Document" ;
    pav:authoredBy sub:_4 ;
    pav:version "20131211" .
  sub:_3 prov:value "During postnatal angiogenesis, quiescent vascular endothelial cells are induced to proliferate through the combined action of different factors: the de novo expression of angiopoietin-2, an endogenous antagonist of angiopoietin-1, which releases the endothelial cells from the stabilizing effects of the vessel wall, the local secretion or activation of vascular growth factors (e.g. VEGF), and the inactivation or suppression of endogenous anti-angiogenic molecules (e.g. thrombospondins)" ;
    prov:wasQuotedFrom pubmed:14984767 .
  sub:_4 rdfs:label "Selventa" .
  sub:assertion prov:hadPrimarySource pubmed:14984767 ;
    prov:wasDerivedFrom beldoc: , sub:_3 .
}