Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 128, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2906128
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We present an extension of the frozen-density embedding (FDE) scheme within density-functional theory [T. A. Wesolowski and A. Warshel, J. Phys. Chem. 97, 8050 (1993)] that can be applied to subsystems connected by covalent bonds, as well as a practical implementation of such an extended FDE scheme. We show how the proposed scheme can be employed for quantum chemical calculations of proteins by treating each constituting amino acid as a separate subsystem. To assess the accuracy of the extended FDE scheme, we present calculations for several dipeptides and for the protein ubiquitin. (C) 2008 American Institute of Physics.
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