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. Author manuscript; available in PMC: 2015 Apr 21.
Published in final edited form as: Prog Mol Biol Transl Sci. 2012;109:75–112. doi: 10.1016/B978-0-12-397863-9.00003-1

TABLE II.

Proteasome Catalytic Subunit Size

Subunit
name
Primary Acc. (#)a
Amino acids (#)b
Molecular weight (Da)b
Pro-pep
(# AA)
Human Mouse Human Mouse Human Mouse
β1 P28072 Q60692 239/205 238/205 25358/21904 25379/21997 33/32
LMP2 P28065 P28076 219/199 219/199 23264/21276 23397/21326 20
β2 Q99436 P70195 277/234 277/234 29965/25218 29891/25252 43
MECL-1 P40306 O35955 273/234 273/234 28936/24648 29063/24804 39
β51c P28074 O55234 263/204 264/205 28480/22458 28532/22529 59
β52c P28074 203/144 21845/15822 9
LMP71c P28062 P28063 276/204 276/204 30354/22660 30260/22650 72
LMP72c P28062 272/204 29770/22660 68
β5t A5LHX3 Q8BG41 300/251 302/253 32530/27232 33220/27851 49
a

UniProtKB (www.uniprot.org).

b

Unprocessed protein/mature protein.

c

Two isoforms, indicated as 1 and 2, are known for β5 and β5i in humans.