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  Domain Name: PA28_beta
Proteasome activator pa28 beta subunit. PA28 activator complex (also known as 11s regulator of 20S proteasome) is a ring shaped hexameric structure of alternating alpha and beta subunits. This family represents the beta subunit. The activator complex binds to the 20S proteasome ana simulates peptidase activity in and ATP-independent manner.