An exopolysaccharide (EPS)-producing strain of YB-2 isolated from mango juice was identified as Leuconostoc pseudomesenteroides. The molecular weight (Mw) of this EPS was 7.67×10⁵ Da. Gas chromatography (GC) analysis confirmed the presence of only glucose monomers. Fourier transform infrared (FT-IR) spectroscopy and nuclear magnetic resonance (NMR) spectra displayed the glucan nature of the EPS with 96.8% α-(1→6) and 3.2% branching α-(1→3) linkages. Scanning electron microscopy (SEM) showed smooth surfaces and compact structure. The water solubility index (WSI) and water-holding capacity (WHC) of dextran were 97.48±2.46% and 287.51±7.93%, respectively. The rheological analysis of dextran elucidated a non-Newtonian pseudoplastic behavior. The dextran revealed an inhibitory activity against Escherichia coli and Staphylococcus aureus with minimal inhibitory concentrations (MIC) of 2.0 mg/mL and 3.0 mg/mL, respectively.

从芒果汁中分离到的一种产生外多糖（EPS）的YB-2菌株被鉴定为假肠球菌。该EPS的分子量（Mw）为7.67×10 ^5。大。气相色谱（GC）分析证实仅存在葡萄糖单体。傅里叶变换红外（FT-IR）光谱和核磁共振（NMR）光谱显示出EPS的葡聚糖性质，具有96.8％的α-（1→6）和3.2％的分支α-（1→3）键。扫描电子显微镜（SEM）显示光滑的表面和紧凑的结构。葡聚糖的水溶性指数（WSI）和持水量（WHC）分别为97.48±2.46％和287.51±7.93％。葡聚糖的流变学分析阐明了一种非牛顿的假塑性行为。葡聚糖显示出对大肠杆菌和金黄色葡萄球菌的抑制活性，最小抑制浓度分别为2.0 mg / mL和3.0 mg / mL。