Resource at http://www.pdb.org/
http://www.pdb.org/pdb/search/structidSearch.do?structureId=5LX8

Resource at http://www.pdb.org/
http://www.pdb.org/pdb/search/structidSearch.do?structureId=5T3R

Resource at http://www.pdb.org/
http://www.pdb.org/pdb/search/structidSearch.do?structureId=5T4Y