Dairy Chemistry And Biochemistry

(^52) DAIRY CHEMISTRY AND BIOCHEMISTRY
CH,OH
Lactose
t
H-C-OH
I
I HO-C-H
I I
H-C
CH20H CHzOH
Lactobionic acid
~H~OH CH,OH
Lactobionic acid-&lactone
Figure 2.25 Structure of lactobionic acid and its &lactone.
Lactose can also be used as a substrate for Xanthomonas campestris in
the production of xanthan gum (Figure 2.28) which has several food and
industrial applications.
All the fermentation-based modifications of lactose are probably not
really economical because lactose is not cost-competitive with alternative