5.3.1.13 ? protein exists as polymers, dimers, and monomers in water solution, gel filtration 749376 5.3.1.13 ? x * 34000, SDS-PAGE 727304 5.3.1.13 ? x * 34067, calculated from amino acid sequence 727304 5.3.1.13 tetramer - 701812 5.3.1.13 tetramer 4 * 21000, SDS-PAGE, 4 * 21810, mass spectrometry -, 748087 5.3.1.13 tetramer 4 * 26000, SDS-PAGE, His-tagged recombinant protein, x * 25740, calculated from sequence 748109 5.3.1.13 tetramer 4 * 33909, electrospray ionization mass spectrometry 662042 5.3.1.13 tetramer 4 * 35000, SDS-PAGE 652445 5.3.1.13 tetramer 4 x 133909, MALDI-MS -, 671856 5.3.1.13 tetramer 4 x 35000, SDS-PAGE, MALDI-MS -, 671856