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. Author manuscript; available in PMC: 2015 Jan 15.
Published in final edited form as: J Comput Chem. 2013 Oct 9;35(2):95–108. doi: 10.1002/jcc.23444

Figure 2.

Figure 2

Flow chart for a QM/MM simulation with the AMBER MD program SANDER using the interface to external QM programs. Data exchange is either based on files and system calls or, in the client/server model, proceeds by sending and receiving the required data between SANDER and the QM program using the MPI-2 standard. The client/server model requires corresponding changes to the QM software package and is currently supported by TeraChem.