Protein Microarrays: Flexible Tools for Scientific Innovation

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Abstract
Protein microarrays have emerged as a powerful tool for the scientific community, and their greatest advantage lies in the fact that thousands of reactions can be performed in a parallel and unbiased manner. The first high-density protein microarray, dubbed the “yeast proteome array,” consisted of approximately 5800 full-length yeast proteins and was initially used to identify protein–lipid interactions. Further assays were subsequently developed to allow measurement of protein–DNA, protein–RNA, and protein–protein interactions, as well as four well-known posttranslational modifications: phosphorylation, acetylation, ubiquitylation, and SUMOylation. In this introduction, we describe the advent of high-density protein microarrays, as well as current methods for assessing a wide variety of protein interactions and posttranslational modifications.

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