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AtSAL1 exists in a monomer–dimer equilibrium. Purified AtSAL1 was exchanged into assay buffer and analyzed by MALLS following separation by size exclusion chromatography. Differential refractive index is shown as a blue line (right axis), and molecular mass derived from light scattering data is shown as red points (left axis). The expected masses of AtSAL1 monomer (37.5 kDa) and dimer (75 kDa) are indicated by dashed lines.
