Liposomes are extensively used to study the interaction of proteins, peptides and other molecules with the surface of a lipid membrane. One of the parameters that affects this interaction is the charge of the liposomal membrane. Liposomes are always made in aqueous environment and they are sized to the desired size in liquid state using various methods such as high-pressure extrusion through nano sized pore track etch membranes. Liposome without water is meaningless. In rare occasions, liposomes are freeze dried and proliposomes are formed in the presence of a lyoprotectant such as trehalose. Using a lyoprotectant is necessary in order to maintain the size of the liposomes after rehydration.
Phosphatidylglycerol (PG) is a negatively charged molecule. The amount of the negative zeta potential in the liposomes depends on the molar percentage of the phosphatidylglycerol (PG) in the formulation. Anionic Lyophosome™-Phosphatidylglycerol (PG) catalog contains products made from 0.5 up to 90 percent DOPG with various amount of negative zeta potentials. The matrix lipid, DOPC, that is used in the formulations does not significantly contribute to the charge of the liposomes. Anionic liposomes are used in blood complement studies and various types of in vitro studies.
Lyophosome™ product catalog is composed of a large selection of freeze-dried liposomes with various types of lipids and wide range of zeta potentials and different properties. Lyophosome™ products should be used by scientists who understand liposome formulation and have the proper equipment to check the size, separate non-encapsulated drugs and do the proper assays. Freeze-dried liposomes cannot be used blindly.
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用双氧水去除过氧化物酶时，我是自己配的3%双氧水滴到片上而非将片浸入双氧水，这样可否？
用博士德的DAB染色，配制方法为：1mlH20中加入DAB、H2O2、TBS各一滴，我配制的时候发现将DAB加入H20时很容易沉淀，要震荡才能混匀，且将配好的DAB滴到玻片上时，DAB会结为很小块的微颗粒悬浮在液体中但并不染色，是否DAB有问题？
现在打算换中衫的试剂盒，代理商说中衫的试剂盒包括了二抗和DAB，想请教一下该试剂盒的具体内容有些什么？
万分感谢！
上海好多的供应商的，具体还是看你选择了，其实试剂盒产品都差不多，什么远慕生物，古朵生物...好多的额
