葡聚糖分子量4k-70k

質(zhì)量90%以上

外觀：紅色固體粉末

FITC標記葡聚糖是由熒光素異硫氰酸酯(5-異構(gòu)體)與相應的葡聚糖偶聯(lián)合成的。FITC標記葡聚糖是黃色至橙色粉末，易溶于水或鹽溶液，呈黃色溶液。該產(chǎn)品也可以溶于DMSO,甲酰胺和其它極性有機溶劑，但在低級脂肪醇，丙酮，氯仿和DMF中基本不溶。葡聚糖是來源于腸系膜白串珠菌B-512F的分支多糖，本質(zhì)上是一種α-(1-6)鏈接的線性葡萄糖鏈。分支比例大約是5%。熒光素是通過穩(wěn)定的硫代氨甲酰鍵鏈接的，標記過程不會引起任何葡聚糖的解聚。FITC標記葡聚糖，每個葡萄糖單元對應0.002到0.008 mol的FITC。 這些低取代度使葡聚糖電荷極小，這也是滲透性研究最基本的要求。

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葡聚糖從細菌( 如白念珠菌) 代謝產(chǎn)物中提取的一種水溶性多糖，由D-葡萄糖以1→6鍵連接，并在支鏈點1→2、1→3和1→4處連接配糖而組成。根據(jù)來源不同，可得到平均相對分子質(zhì)量不同的各種支鏈葡聚糖。最初，葡聚糖被用作血漿替代品，由于其具有生物可降解、非特異性細胞黏附、抵御蛋白吸附、價格便宜及易于結(jié)構(gòu)改造等特點，成為載體材料研究的熱點。

Dextran is a water-soluble polysaccharide extracted from the metabolites of bacteria (e.g. Candida albicans). It is composed of D-glucose linked by 1 → 6 bonds and linked by glycosylation at branch points 1 → 2, 1 → 3 and 1 → 4. According to different sources, various branched glucans with different average relative molecular weights can be obtained. At first, glucan was used as a substitute for plasma. Because of its biodegradability, non-specific cell adhesion, resistance to protein adsorption, low price and easy structural modification, it has become a hotspot in the research of carrier materials.

Dextran-FITC

Dextran-Rhodamine

CY3-Dextran

CY3.5-Dextran

CY5-Dextran

CY5.5-Dextran

CY7-Dextran

CY7.5-Dextran

ICG-Dextran

Dextran-Amine

Dextran-Thiol

Dextran-Azide

Dextran-Maleimide

Dextran-Alkyne

Dextran-NHS