text: Examples of response elements include:
  * Nuclear receptor response elements &ndash; two 6-meric repeats for dimeric binding
  ** Type 2 NR response elements: direct repeat RGKTCA motifs, canonically AGGTCA
  *** Vitamin D response element (VDRE)
  *** Retinoic acid response elements (RAREs) 
  *** ROR-response element
  *** Thyroid hormone response element  
  *** Growth hormone response element (GHRE) 
  *** Peroxisome proliferator hormone response elements (PPREs) 
  ** Type 1 NR response elements (typical of hormone response elements) &ndash; inverted repeat
  *** estrogen response elements (EREs)
  *** androgen response elements (AREs)
  *** glucocorticoid response elements (GREs)
  *cAMP response element (CRE)
  *B recognition element
  *AhR-, dioxin- or xenobiotic- responsive element 
  *Hypoxia-responsive elements 
  *Serum response element (SRE) 
  *Metal-responsive element (MRE) 
  *DNA damage response element (DRE) 
  *IFN-stimulated response elements (ISREs)
  *[https://www.ebi.ac.uk/interpro/entry/IPR029309 Calcium-response element CaRE1] 
  *Antioxidant response element (ARE) 
  *[http://p53.iarc.fr/TargetGenes.aspx p53 response element] 
  *Sterol regulatory element
  *Polycomb Response Elements (PREs) 
  *Rev response element (RRE)
  *Wnt response element (WRE), core CTTTG