20S proteasome alpha subunit G 249 MSSIGTGYDLSVTTFSPDGRVFQIEYAAKAVDNSGTAVGIKCKDGIVLGVEKLIQSKMMLPGSNRRIHSVHRHSGMAVAGLAADGRQIVARAKSEATNYESVYGEAVPVKELADRVASYVHLCTLYWWLRPFGCGVILGGYDRDGPQLYMVEPSGISYRYFGAAIGKGKQAAKTEIEKLKLSEMTCREGIIEVAKIIYKVHDEAKDKAFELEMSWICDESKREHQKVPDNLLQEAKAAATAALEEMDAD 20S proteasome subunit alpha-7 Proteasome component C8 Proteasome subunit alpha type-3 PSA3_SPIOL PSC8 PAG1 The proteasome is a multicatalytic proteinase complex which is characterized by its ability to cleave peptides with Arg, Phe, Tyr, Leu, and Glu adjacent to the leaving group at neutral or slightly basic pH. The proteasome has an ATP-dependent proteolytic activity.