of O. nipponica BCC 2092 and G. pulchra BCC 2711 had almost complete acid resistance (99.0%), which is higher than that of exobiopolymer of A. samoensis BCC 2466 (97% resistance). In contrast, exobiopolymer of A. samoensis BCC 2466 is superior resistance to enzyme hydrolysis (99.5%), compared with the other two exobiopolymers. This result showed high potential of these three exobiopolymers to be used as prebiotics