3.2 Molecular weight of exobiopolymers As shown in Table 1, the molecular weight of exobiopolymers from A. samoensis BCC 2466, G.
pulchra BCC 2711, and O. nipponica BCC 2092 was 4.34, 4.06, and 3.39, respectively. These exobiopolymers have been previously characterized and were of different chemical composition, with belonging to the group of glucan. Moreover, it was notable that the molecular weights of exobiopolymers were in the range of oligosaccharides as well as currently available prebiotics such as inulin. Oligosaccharides were found to be more promising although dietary carbohydrates such as fibers as a candidate prebiotics (25).