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 "1.4" .
  sub:_3 prov:value "Established tumors in nude athymic BALB/c mice were sampled at various times after androgen withdrawal and after the development of androgen independence. Changes in the expression of cell cycle regulators were categorized into early and mid-to-late events. RESULTS and CONCLUSIONS: Early events included a decrease in androgen receptor expression, followed by a short-term increase in expression of the p53 and p21/WAF1 proteins and a marked decrease in the Ki67 proliferative index." ;
    prov:wasQuotedFrom pubmed:10547394 .
  sub:_4 rdfs:label "Selventa" .
  sub:assertion prov:hadPrimarySource pubmed:10547394 ;
    prov:wasDerivedFrom beldoc: , sub:_3 .
}