Encyclopedia of Systems Biology

2013 Edition
| Editors: Werner Dubitzky, Olaf Wolkenhauer, Kwang-Hyun Cho, Hiroki Yokota

Position-Specific Scoring Matrices (PMMS)

  • Joo Chuan Tong
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-9863-7_939


The matrix comprises of 20 rows whereby each row corresponds to a unique amino acid symbol and each column corresponds to the position in the peptide sequence. The weight of a given amino acid at a certain position of the sequence is given by the log function ratio of the observed incidence of a given amino acid against the background incidence.


Copyright information

© Springer Science+Business Media, LLC 2013

Authors and Affiliations

  1. 1.Data Mining DepartmentInstitute for Infocomm ResearchSingaporeSingapore