1.1.1.121 ? x * 30000, SDS-PAGE 1.1.1.121 ? x * 38000, sedimentation analysis in 4.2 M guanidinium chloride, presence of subunits of unequal size might be possible 1.1.1.121 additional information the AldT subunit forms a typical SDR fold with an unexpectedly long C-terminal tail and assembles into an intertwined tetramer, inter-subunit interactions, crystal structure, structure comparison, overview 1.1.1.121 tetramer 4 * 27000, SDS-PAGE