β-galactosidase activity of leuconostocs

ÇIBIK R.

Indian Veterinary Journal, cilt.82, sa.2, ss.169-171, 2005 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 82 Sayı: 2
  • Basım Tarihi: 2005
  • Dergi Adı: Indian Veterinary Journal
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.169-171
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

β-galactosidase (β-gal) activity level of 43 leuconostoc strains obtained from various traditionally made french cheese was evaluated. β-gal activity was determined on the permeabilized bacteria using toluene by measuring the rate of hydrolysis of 0-nitrophenil-β-D-β- galactopyranoside (ONPG). High level of variability was observed among the tested strains. Ninety three per cent of Ln. mes. subsp. mesenteroides, 91% of Ln. mes. subsp. dextraniam, 67% of Ln. citreum, one out of four strains of Ln. mes. subsp. cremoris and both of the Ln. lactis strains tested were positive.