2.6.1.13 ? decreasing pH or raising ionic strength enhances aggregation of the enzyme 637117 2.6.1.13 ? x * 45000, pro-enzyme form, SDS-PAGE 759181 2.6.1.13 ? x * 45000, SDS-PAGE 637124 2.6.1.13 ? x * 46000-47000, SDS-PAGE 637124 2.6.1.13 ? x * 48100, calculated 688463 2.6.1.13 ? x * 50700, calculated 689114 2.6.1.13 ? x * 51200, calculated, x * 49000, SDS-PAGE 689633 2.6.1.13 dimer - 637100 2.6.1.13 dimer 2 * 41000, SDS-PAGE -, 637121, 637130 2.6.1.13 dimer 2 * 42000, SDS-PAGE 637102