Table 3.

Immobilization yield (IY) and residual activity (RA) in the immobilization of Xyl2 by different approaches

Immobilization method	RA (%)	IY (%)
Free enzyme	100.0	−
CLEA (25 % glutaraldehyde)	8.5	65
His-select affinity resin	4.2	>95
Glutaraldehyde–chitosan	ND	35
AM-1	133.0	25
AM-2	46.0	25
AM-3	58.0	27
AM-4	48.0	25
GL-1	157.8	32
GL-2	39.6	61
GL-3	151.3	33
GL-4	34.0	68
GL-5	18.2	76

ND not detected. IY/RA values above 50 % are shown in italic face