(2~{S},3~{R})-4-[[(2~{S})-3-methyl-1-[[(2~{S})-3-methyl-1-oxidanylidene-1-phenylmethoxy-butan-2-yl]amino]-1-oxidanylidene-butan-2-yl]amino]-3-oxidanyl-4-oxidanylidene-2-propan-2-yl-butanoic acid

P30656 — Proteasome subunit beta type-5