1.2.3.15 ? x * 57000, calculated from amino acid sequence -, 739562 1.2.3.15 ? x * 70000, SDS-PAGE -, 739130 1.2.3.15 ? x * 77000, SDS-PAGE 763112 1.2.3.15 monomer 1 * 68000, SDS-PAGE -, 739561