Keratan sulfate (KS) is cleaved from its KS proteoglycan (KSPG) by an as yet unknown beta-galactosidase. It performs a similar function to beta-galactosidase GLB1 (Asp et al. 1969). A simplified version of KS is used to demonstrate cleavage reactions.
Koldovský, O, Asp, NG, Dahlqvist, A
beta-galactosidase activity of keratan sulfate 1,4-beta-D-galactosidase [lysosomal lumen]
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