The BAH domain (bromo-associated homology domain) was first identified from a repeated motif found in the nuclear protein polybromo--a large (187 kDa) modular protein comprising six bromodomains, two BAH domains and an HMG box. To date, the BAH domain has no ascribed function, although it is found in a wide range of proteins that contain additional domains involved in either transcriptional regulation (e.g.
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