4.2.2.19 additional information - - 652553 4.2.2.19 additional information - analytical method for the determination of disaccharides derived from keratan, heparan, and dermatan sulfates in human serum and plasma by high-performance liquid chromatography/turbo ionspray ionization tandem mass spectrometry 677536 4.2.2.19 additional information - specific activity of 100-300 units/mg 692532 4.2.2.19 80.8 - purified recombinant enzyme 649575