TABLE 1.

Percent activity of purified H-BgaS with various nitrophenyl-derived chromogenic substrates

Substrate	Activitya (%)
o-Nitrophenyl-β-d-galactoside	100
p-Nitrophenyl-β-d-galactoside	84.1
o-Nitrophenyl-β-d-fucopyranoside	<2
p-Nitrophenyl-β-d-cellobioside	<2
o-Nitrophenyl-β-d-glucoside	<2
p-Nitrophenyl-α-d-galactoside	<2
p-Nitrophenyl-β-d-mannoside	<2
p-Nitrophenyl-β-d-xyloside	<2
p-Nitrophenyl-β-d-arabinoside	<2
p-Nitrophenyl-β-d-lactoside	<2
p-Nitrophenyl-β-d-galacturonide	<2
p-Nitrophenyl-β-d-glucuronide	<2

^aThe values are relative to the 100% value observed with ONPG (27.0 U/mg).