“…This has focussed on enzymatic conversion using L-arabinose isomerases (L-AI; EC 5.3.1.4), since chemical production of D-tagatose from D-galactose has some disadvantages, such as complex purification steps, chemical waste formation, and by-product formation (Fan et al, 2014). p0370 L-arabinose isomerases have been isolated and characterized from several Geobacillus strains, including G. stearothermophilus KCCM 12265 (Kim, Kim, Oh, & Oh, 2006), G. stearothermophilus US100 (Rhimi & Bejar, 2006), G. stearothermophilus IAM 11001 (Cheng, Mu, & Jiang, 2010), G. stearothermophilus DSM 22 (Lee et al, 2005), G. thermodenitrificans (Kim & Oh, 2005), and G. thermoglucosidasius KCTC 1828 (Seo, 2013). Higher optimum reaction temperatures (50e70 C) change the aldoseeketose equilibrium adding weight to the exploitation of Geobacillus in this regard.…”