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Paper   IPM / Physic / 6751
School of Physics
  Title:   Geometry Selects Highly Designable Structures
  Author(s): 
1.  V. Shahrezaei
2.  M.R. Ejtehadi
  Status:   Published
  Journal: J. Chem. Phys.
  No.:  103
  Vol.:  113
  Year:  2000
  Pages:   6437-6442
  Supported by:  IPM
  Abstract:
By enumerating all sequences of length 20, we study the designability of structures in a two-dimensional Hydrophobic-Polar (HP) lattice model in a wide range of inter-monomer interaction parameters. We find that although the histogram of designability depends on interaction parameters, the set of highly designable structures is invariant. So in the HP lattice model the High Designability should be a purely geometrical feature. Our results suggest two geometrical properties for highly designable structures, they have maximum number of contacts and unique neighborhood vector representation. Also we show that contribution of perfectly stable sequences in designability of structures plays a major role to make them highly designable.

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