
S. pneumoniae Topoisomerase IV
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S. pneumoniae Topoisomerase IV

Topo IV (from Streptococcus pneumoniae) is prepared by overexpressing the subunits in E. coli and purifying them by methods developed in-house.
The subunits are purified to >95% purity as judged by SDS-PAGE. The topo IV is supplied as a heterotetramer complex in Dilution buffer.
It is recommended that the enzyme is aliquoted to avoid repeated freeze-thaw cycles. Store at -80ºC.
All enzyme is supplied with 5X concentrated Assay Buffer and Dilution buffers which are also available separately.
See technical documents below for more detailed information and lot specific activities.
Technical Documents
S. pneumoniae Topoisomerase IV Relaxation Assay Kits

These contain S. pneumoniae topo IV and the supercoiled DNA substrate in addition to the Assay and Dilution buffers for relaxation reactions. 1 U of topo IV will relax 0.5 µg supercoiled pBR322 DNA in 30 minutes at 37°C.
Technical Documents
S. pneumoniae Topoisomerase IV Decatenation Assay Kits

These contain S. pneumoniae topo IV and the catenated kDNA substrate in addition to the Assay and Dilution buffers for decatenation reactions. 1 U of topo IV will decatenate 200 ng of kDNA when incubated in 1X Assay buffer in a total reaction volume of 30 µl at 37°C for 30 minutes.
Technical Documents
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请问BAC蛋白浓度测定波长是562,我们这边酶标仪的滤光片波长最接近的是595,这样也可以测吗
我需要做pcr,做之前用酶标仪测定同一管dna浓度时,数字相差很大,有100度的也有五六十的,这是正常现象么,因为要做正交实验,需要准确的浓度,这种状况,我应该怎么确定浓度呢?求助求助!!
首先,酶标仪是用于医疗卫生方面的,其次,酶标仪实际上就是一台变相的专用光电比色计或分光光度计,其基本工作原理与主要结构和光电比色计基本相同。比色计是被列入强制检定目录的,因此需要强制检定。
【酶标仪】即酶联免疫检测仪,是酶联免疫吸附试验的专用仪器,又称微孔板检测器。可简单地分为半自动和全自动2大类,但其工作原理基本上都是一致的,其核心都是一个比色计,即用比色法来进行分析。 测定一般要求测试液的最终体积在250μL以下,用一般光电比色计无法完成测试,因此对酶标仪中的光电比色计有特殊要求。
测器和微处理器控制系统等组成.
光源灯发出的光线经过滤光片或单色器后,成为一束单色光.该单色光束经过酶标板中的待测标本,被标本吸收掉一部分后,到达光电检测器.光电检测器将投照到
上面的光信号的强弱转变成电信号的大小.此电信号经前置放大、对数放大、模数转换等处理后,送人微处理器进行数据处理和计算,最后通过显示器和打印机输出
测试结果.
CSY-E96D动物疾病快速诊断仪采用固相酶联免疫吸附ELISA的原理,即酶联免疫法;可定量快速畜牧类疾病诊断如禽流感、猪瘟、猪蓝耳、伪狂犬等疾病,广泛应用于养殖场、屠宰场、肉产品深加工企业、检验检疫单位使用。

