Table II. Enzyme activity in the apoplast of the tobacco cells at 5 d after onset of culture.

Data represent means ± sd of three independent experiments. n.d., Not detected.

Fraction	Tobacco Cells	α-Xylosidase	β-Glucosidase	β-Xylosidase	PAP	Protein
		10−3 units per flask				μg per flask
Wall	Wild type	73.9 ± 4.7	123 ± 11.7	n.d.	0.8 ± 0.1	56
	Transgenic	8.5 ± 1.3	82 ± 5.1	n.d.	16.5 ± 1.9	55
Medium	Wild type	39.9 ± 6.3	41 ± 3.8	29.9 ± 1.9	n.d.	48
	Transgenic	4.8 ± 0.5	8 ± 0.7	9.2 ± 1.0	n.d.	43