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. Author manuscript; available in PMC: 2015 Dec 15.
Published in final edited form as: J Comput Chem. 2014 Oct 18;35(32):2305–2318. doi: 10.1002/jcc.23753 
AtomicGroup namd_model = createSystem("model.pdb");
AtomicGroup gro_model = createSystem("model.gro");
AtomicGroup amber_model = createSystem("model.parmtop");
AtomicGroup tinker_model = createSystem("model.xyz");