5.1.99.7	homohexamer	6 * 13700, SDS-PAGE, 6 * 13993, sequence calculation	734122	
5.1.99.7	octamer	the enzyme protein is an octamer both in the crystal structure, and in solution formed by two tetramers. The monomeric enzyme structure comprises a four-stranded antiparallel sheet, composed of beta1 (residues 10-12 and 16-20), beta2 (residues 33-42), beta3 (residues 98-106) and beta4 (residues 114-121), structure comparisons, overview	733859