Genome Biol. 2000;1(5):REVIEWS0005. Epub 2000 Nov 8.

Can sequence determine function?

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Departments of Biochemistry and Chemistry, University of Illinois, Urbana, IL 61801, USA. j-gerlt@uiuc.edu

Abstract

The functional annotation of proteins identified in genome sequencing projects is based on similarities to homologs in the databases. As a result of the possible strategies for divergent evolution, homologous enzymes frequently do not catalyze the same reaction, and we conclude that assignment of function from sequence information alone should be viewed with some skepticism.

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