Peptide arrays have attracted wide interest as tools for discovering biochemical interactions. Because many protein binding and enzyme activities are directed towards peptides, the preparation of arrays having hundreds to thousands of immobilized peptides offers an unprecedented opportunity for identifying interactions of proteins. This short opinion reviews recent progress in the preparation of peptide arrays and their use in the characterization of biomolecular interactions and the discovery of new reagents for biological researches. This body of work establishes the feasibility of this technology and suggests that it will find much wider use in research groups.
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