4.2.3.13 ? x * 64200, calculated 4.2.3.13 ? x * 64200, calculated from amino acid sequence 4.2.3.13 ? x * 64600, about, sequence calculation 4.2.3.13 monomer 1 * 64000, gel filtration, SDS-PAGE 4.2.3.13 monomer 1 * 64000-65000, SDS-PAGE