Polystyrene-an inert carrier for LXXX-glutaminase production by marine Vibrio costicola under solid-state fermentation.

Polystyrene beads, impregnated with mineral salts/glutamine medium as inert support, were used to produce LXXX-glutaminase from Vibrio costicola by solid-state fermentation. Maximum enzyme yield, 88 U/g substrate, was after 36 h. Glucose at 10 g/kg enhanced the enzyme yield by 66%. The support system allowed glutaminase to be recovered with higher specific activity and lower viscosity than when a wheat-bran system was used.