Statistical properties of contact maps

Michele Vendruscolo, Balakrishna Subramanian, Ido Kanter, Eytan Domany, Joel Lebowitz

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


A contact map is a simple representation of the structure of proteins and other chainlike macromolecules. This representation is quite amenable to numerical studies of folding. We show that the number of contact maps corresponding to the possible configurations of a polypeptide chain of N amino acids, represented by [Formula Presented]-step self-avoiding walks on a lattice, grows exponentially with N for all dimensions [Formula Presented] We carry out exact enumerations in [Formula Presented] on the square and triangular lattices for walks of up to 20 steps and investigate various statistical properties of contact maps corresponding to such walks. We also study the exact statistics of contact maps generated by walks on a ladder.

Original languageEnglish
Pages (from-to)977-984
Number of pages8
JournalPhysical Review E
Issue number1
StatePublished - 1999


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