Two polysaccharides (SCP1 and SCP2) were isolated from Sargassum carpophyllum obtained in the South China Sea. SCP1 consisted of mannose, glucuronic acid, glucose and xylose in a molar ratio of 89.9:1.6:7.6:0.8, while SCP2 consisted of mannose, rhamnose, glucuronic acid, galacturonic acid and glucose in a molar ratio of 70.8:14:5.4:6.2:3.5. SCP1 contained the glycosidic linkages of →3)-α-D-Man(1→ and β-D-Xyl(1→, while SCP2 contained the linkages β-D-Man(1→ and →3)-β-D-GalA(1→. Both SCP1 and SCP2 expressed good antioxidant activity against O₂⁻, OH, DPPH radical and ABTS radical. SCP2 had better antioxidant activity. Meanwhile, the two polysaccharides exhibited excellent immunostimulatory activity. Compared with SCP1, SCP2 showed higher immunostimulatory activity due to its stronger function on promoting cytokine secretion (IL-2 and TNF-α) of macrophages. The results indicated that the polysaccharides from Sargassum carpophyllum have a potential to be a health-improving ingredient in functional food and pharmaceutical.

从南海获得的羊栖菜中分离出两种多糖（SCP1和SCP2）。SCP1由甘露糖，葡萄糖醛酸，葡萄糖和木糖组成，摩尔比为89.9：1.6：7.6：0.8，而SCP2由甘露糖，鼠李糖，葡萄糖醛酸，半乳糖醛酸和葡萄糖组成，摩尔比为70.8：14：5.4： 6.2：3.5。SCP1包含→3）-α-D-Man（1→和β-D-Xyl（1→）的糖苷键，而SCP2包含β-D-Man（1→和→3）-β-D-D-的糖苷键。的GalA（1→两个SCP1和SCP2对ö表达良好的抗氧化性。₂ ^-，OH，DPPH自由基和ABTS自由基。SCP2具有更好的抗氧化活性。同时，两种多糖表现出优异的免疫刺激活性。与SCP1相比，SCP2由于具有较强的促进巨噬细胞分泌细胞因子（IL-2和TNF-α）的功能，因此具有更高的免疫刺激活性。结果表明，羊栖菜中的多糖有可能成为功能性食品和药品中的健康改良成分。