1Z7Q | c:1002-1221; d:1002-1221; e:1002-1221; f:1002-1221; g:1002-1221; h:1002-1221; i:1002-1221; j:1002-1221; k:1002-1221; l:1002-1221; m:1002-1221; n:1002-1221; o:1002-1221; p:1002-1221 | CRYSTAL STRUCTURE OF THE 20S PROTEASOME FROM YEAST IN COMPLEX WITH THE PROTEASOME ACTIVATOR PA26 FROM TRYPANOSOME BRUCEI AT 3.2 ANGSTROMS RESOLUTION |