期刊
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
卷 803, 期 1-3, 页码 115-122出版社
ELSEVIER
DOI: 10.1016/j.theochem.2006.10.010
关键词
biological sequences; transition matrix; protein secondary structure; similarity
Protein database is growing rapidly, but it is difficult to obtain information from protein sequences directly. Therefore, many kinds of methods have been proposed to analyze the protein sequences, the existing methods have their limitations to numerically characterize the protein sequences exactly. Here, we regard a protein sequence as a discrete-time Markov chain and construct transition matrices to numerically characterize it. Based on the properties of Markov chains, we predict the yesterday's, today's, and tomorrow's distributions of every amino acid, from which we can analyze the similarities of different species in the past or in the future. Meanwhile, we give a simple way to evaluate the methods for protein secondary structure prediction. (c) 2006 Elsevier B.V. All rights reserved.
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