3.13.1.1 additional information - additional information Km values for UDP-glucose are indistinguishable for the native and the recombinant enzyme, but the Km value for sulfite is over 4fold lower for the native enzyme 649481 3.13.1.1 additional information - additional information the affinity for sulfite of the native enzyme is at least 4fold higher compared to the recombinant spinach SQD1, whereas that for UDP-glucose is similar 723680 3.13.1.1 0.01 - sulfite - 393361 3.13.1.1 0.15 - UDP-glucose - 393361