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:_5 ;
    pav:version "1.4" .
  sub:_4 prov:value "An up-regulation of Mash1 (Ascl1) expression was observed throughout the dorsomedial cortical ventral zone of Ngn2 mutant embryos at E12.5 and E13.5. This up-regulation was less apparent in the lateral ventral zone in which Ngn1 expression was maintained in Ngn2 mutants. Mash1 up-regulation was strikingly enhanced in the dorsal telencephalon and dorsal thalamus of Ngn1 and Ngn2 double mutant embryos. These results suggest that the Ngns function in a partially redundant manner to restrict Mash1 expression to limited domains of the forebrain neuroepithelium." ;
    prov:wasQuotedFrom pubmed:10640277 .
  sub:_5 rdfs:label "Selventa" .
  sub:assertion prov:hadPrimarySource pubmed:10640277 ;
    prov:wasDerivedFrom beldoc: , sub:_4 .
}