Histone 3 (H3) is a protein that is a component of chromatin, the complex of DNA and proteins that makes up the chromosomes in the nucleus of eukaryotic cells. H3 is one of the five main histone proteins, and it plays a crucial role in the regulation of gene expression and the maintenance of chromatin structure.
H3 has been found to be overexpressed in various types of cancer, including breast, prostate, lung, and colon cancer.
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