Herein, the improvement of mechanical strength by pullulan loading can be attributed to the chemical structure of pullulan, which is an exocellular homopolysaccharide
and a linear mix of [alpha]-D-glucan consisting mainly of maltotriose repeating units interconnected by [alpha]-1,6 linkages.
In a previous study, it reported the bacterial EPS consisted of high molecular weight, 10 to 30 kDa, not only in homopolysaccharide
form but also heteropolysaccharide form .
Glucan, a homopolysaccharide
of glucose bonded via [?
EPS from microbial sources can be classified into two groups: homopolysaccharides
and heteropolysaccharides based on their monosaccharide composition and biosynthetic pathway (85).
The preparation of cellulose and other homopolysaccharides
by linking together sugars in a stereospecific manner is in principle possible, but it would be very difficult and tedious.