Resource at http://www.ncbi.nlm.nih.gov/
http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE21764

Resource at http://www.ncbi.nlm.nih.gov/
http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE21910

Resource at http://www.pdb.org/
http://www.pdb.org/pdb/search/structidSearch.do?structureId=3P5O