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α-Galactosidases catalyze the hydrolysis of a galactosyl residue from galactooligosaccharides and galactopolysaccharides. α-Galactosidase I from Mortierella vinacea was crystallized in two crystal forms using the hanging-drop vapour-diffusion method. Type 1 crystals belonged to space group I422, with unit-cell parameters a = b = 142.4, c = 131.5 Å, and diffracted to beyond 2.1 Å resolution, while type 2 crystals belonged to space group P4, with unit-cell parameters a = b = 100.9, c = 102.7 Å, and diffracted to beyond 1.6 Å resolution. This enzyme crystallized as a glycoprotein tetramer and the tetrameric structure was located around the crystallographic fourfold axis.

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