Aggregation behavior of nonionic glycolipid vesicles in acidic region

Large unilamellar vesicles composed of a nonionic synthetic glycolipid, 1,3 -di-0-phytanyl-2-0-(beta -maltotriosyl)glycerol show pH-dependent aggregati on - dissociation process, that is, vesicle aggregation occurs in the lower pH region and vesicle dissociation occurs in the higher pH region. This pr ocess is almost reversible and the aggregation threshold pH is dependent on NaCl concentration. Fluorescence technique has been applied to study wheth er the vesicle fusion occurs or not during the aggregation-dissociation pro cess. It is concluded pH can only induce the aggregation of this nonionic g lycolipid vesicle.