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PBS (Phosphate-Buffered Saline) Tablets

PBS(磷酸盐缓冲盐水)片

公司名称: Thermo Fisher Scientific
产品编号: 003002
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High-throughput β-galactosidase and β-glucuronidase Assays Using Fluorogenic Substrates
Author:
Date:
2013-07-20
[Abstract]  β-galactosidase and β-glucuronidase enzymes are commonly used as reporters for gene expression from gene promoter-lacZ or uidA fusions (respectively). The protocol described here is a high-throughput alternative to the commonly used Miller assay (Miller, 1972) that utilises a fluorogenic substrate (Fiksdal et al., 1994) and 96-well plate format. The fluorogenic substrates 4-Methylumbelliferyl β-D-galactoside (for β-galactosidase assays) (Ramsay et al., 2013) or 4-Methylumbelliferyl β-D-glucuronide (for β-glucuronidase assays) (Ramsay et al., 2011) ... [摘要]  β-半乳糖苷酶和β-葡糖醛酸糖苷酶通常用作从基因启动子 - lacZ/em或uidA/em融合(分别)的基因表达的报道分子。本文所述的方案是利用荧光底物(Fiksdal等人,1994)和96孔板形式的通常使用的Miller测定法(Miller,1972)的高通量替代物。荧光底物4-甲基伞形基β-D-半乳糖苷(用于β-半乳糖苷酶测定)(Ramsay等人,2013)或4-甲基伞形基β-D-葡萄糖醛酸苷(用于β-葡糖醛酸糖苷酶测定)( Ramsay等人,2011)切割以产生荧光产物4-甲基伞形酮。通过冷冻 - 融化和溶菌酶使细胞透化,并且通过荧光微板读数器作为动力学测定连续监测4-甲基伞形酮的产生。然后计算荧光增加的速率,从中推断相对基因表达水平。由于高灵敏度基于荧光的4-甲基伞形酮的检测和所收集的高密度时间点,该测定可以在低水平基因表达的定量中提供增加的准确度。该测定需要小的样品体积和最小的制备时间。本方案中概述的透化条件已经针对革兰氏阴性细菌(特别是大肠杆菌和沙雷氏菌)进行了优化,但是可能适合于具有最小优化的其他生物体。

Culture of Rat Olfactory Ensheathing Cells Using EasySep® Magnetic Nanoparticle Separation
Author:
Date:
2013-04-20
[Abstract]  Olfactory ensheathing cells (OECs) can be isolated and purified from a range of postnatal day 7-day to 10-day rat olfactory bulbs. Rat OECs express the CD271/p75NTR receptor and using the “Do-It-Yourself” magnetic nanoparticle EasySep kit from STEMCELL technologies this protocol allows the selective purification of these cells in less than 50 min. Similar procedure can be used for mouse cultures. [摘要]  嗅鞘细胞(OECs)可以从出生后第7天到10天的大鼠嗅球分离和纯化。 大鼠OEC表达CD271 / p75NTR受体,并使用STEMCELL技术的“Do-It-Yourself”磁性纳米颗粒EasySep试剂盒,该方案允许在不到50分钟内对这些细胞进行选择性纯化。 类似的方法可用于小鼠培养。

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