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文献和实验动物的肥大细胞合成的粘多糖的一种。原来是从肝中得到的抗凝血的物质。作为医药是由肠粘膜等加工而得到的不含蛋白的制剂,已知在生物体内是和其他粘多糖一样,是以与蛋白结合的蛋白聚糖形态而存在,但不象硫酸软骨素那样的细胞外间质成分,似乎可以说它是细胞内成分。肝素的抑制作用必须有辅助因子(co-factor),但它是靠与蛋白质或其他带正电荷的高分子电解质的结合性而实现的,例如凝血酶和肝素辅因子结合成复合体则起抑制凝固作用。多糖链是由L-艾杜糖醛酸、D-葡萄糖醛酸、D-葡萄糖胺组成,硫酸
Low-Temperature Embedding in Acrylic Resins
It has been demonstrated that enzymes (5 ,6 ) can maintain their structure and their activity at very low temperature in concentrated organic solvent. Therefore, in order to minimize molecular thermal vibration, which can have adverse
Beads on the Run: Beads as Alternative Tools for Chemotaxis Assays
migration from development to cancer, the question of how chemotaxis is achieved has also to be asked on a bigger scale. Here, we present two chemotaxis assays suitable for single cells, cell sheets, and cell explants. Using a simple combination of heparin
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