2,4,5-TRIAMINO-6-HYDROXY-PYRIM

Metabolic Labeling with Sulfate

of proteins make it possible to determine where a protein normally resides or to follow its transport through the cell. One such modification is addition of sulfate either to tyrosine residues or to carbohydrate side chains. Labeling studies with [35 S

Ammonium Sulfate Binding Assay for Cells

1. Resuspend cells (vegetative or developed) in phosphate buffer at 1 x 10 8 /ml . 2. Add 50 ul cells to 50 ul 20 nM 3H-cAMP in 5-10 mM DTT (for background binding, add same amount of hot cAMP plus 10 uM cold cAMP) in 1.5 ml eppendorf tube

硫酸皮肤素 dermatan sulfate

  　　在哺乳动物真皮中发现的一种粘多糖。在真皮中，于成熟的胶原纤维丰富的层中，以蛋白多糖即以与蛋白质相结合的（蛋白硫酸皮肤素）形式而存在。因此胶原分子是按一定的空间排列集成，并由桥键组成纤维构造，而蛋白硫酸皮肤素具有重要作用。除皮肤以外，也可从大动脉、脐带、腱、心脏瓣膜、肝脏和半月瓣等分离出来，而在鼻软骨和骨端软骨中并不存在。化学构造如图所示是 L-艾杜糖醛酸和 N-乙酰半乳糖胺 -4-硫酸所形成的二糖单位的重复结构而为其主体，但糖醛酸的一部分为艾杜糖