TABLE 1.

Solvent stabilities of spore-displayed β-Gal on different B. subtilis spores and free-form enzymes in various organic solvents after 1 h of incubation at 37°C

Solvent	Solvent hydrophobicity (log P value)	Relative activities of β-Gal
		Displayed on DB104 spores	Displayed on WB700 spores	Free form
Control		100	100	100
n-Hexane	3.5	100	100	84.3
Ethyl ether	0.8	77.2	97.0	48.2
Toluene	2.5	51.6	78.8	4.2
Ethyl acetate	0.68	9.6	10.6	0.1
Acetonitrile	−0.33	0.8	8.3	0.0
Ethanol	−0.24	0.0	0.0	0.0