Production of beta-galactosidase from Streptococcus thermophilus grown in whey.

Abstract:

:beta-D-Galactosidase (EC 3.2.1.23) was extracted from Streptococcus thermophilus grown in deproteinized cheese whey. Cultural conditions optimum for maximum enzyme production were pH 7.0, 40 degrees C, and 24 h. Proteose peptone (2.0%, wt/vol) and corn steep liquor (2.8%, wt/vol) were highly stimulatory, increasing the enzyme units available in their absence from 660 U/liter of medium to 18,200 and 10,000 U/liter of medium, respectively, in their presence. There was an insignificant increase in the production of enzyme in the presence of added inorganic nitrogen and phosphorus sources. Enzymatic hydrolysis for recuction of lactose content in aqueous solution and in skim milk was studied.

journal_name

Appl Environ Microbiol

authors

Rao MV,Dutta SM

doi

10.1128/AEM.34.2.185-188.1977

subject

Has Abstract

pub_date

1977-08-01 00:00:00

pages

185-8

issue

2

eissn

0099-2240

issn

1098-5336

journal_volume

34

pub_type

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