~{N}-[(2~{S},3~{R})-1-[[(5~{S},8~{S},10~{S})-5-methyl-10-oxidanyl-2,7-bis(oxidanylidene)-1,6-diazacyclododec-8-yl]amino]-3-oxidanyl-1-oxidanylidene-butan-2-yl]-5-phenyl-pentanamide

P25451 — Proteasome subunit beta type-3