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上海圻明生物
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Streptococcus pneumoniae肺炎链球菌染料法荧光定量PCR试剂盒上海圻明生物优势供应。更多产品资料欢迎免费咨询。
One of the many important uses of PCR technology is that it can be used to label DNA probes with high specific activity. PCR technology has high specificity, and can synthesize probe DNA fragments in quantities within 1~2h if [α-32P]dNTP or other markers are added to the substrate
dNTPs, the probe DNA can be well labeled during DNA synthesis, and the incorporation rate of the marker can be as high as 70%~80%. Therefore, PCR labeling technology is particularly suitable for large-scale detection and non-radiolabeling. The disadvantage of this method is that a specific pair of PCR primers is synthesized.
Labeling can also be achieved by using small fragments prepared from probe DNA as primers.
Solution preparation
1. Prepare a stock solution
Unless otherwise stated, all unused stock solutions should be divided into disposable aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles.
1.1* Acid Stock Solution (125X):
Add 20 μL DMSO to *ate (component B) to make a 125X* acid stock solution.
2. Prepare standard solutions
*Salt standard solution
Add 50 μL of 1 mM KH2PO4 (Component C) to 950 μL of deionized water or enzyme reaction buffer to give a 50 μM * saline standard solution (PS7). A 50 μM * saline standard solution (PS7) was taken and serially diluted 1:2 to obtain a serially diluted phosphate standard with deionized water or enzyme reaction buffer.
3. Prepare a working solution
Add 20 μL of 125X* stock solution to 2.5 mL of sterile H2O and mix well to make a working solution of *salt. Avoid potential Pi contamination. Note: Avoid direct exposure of *salts (component B) to light. Due to the high sensitivity of this assay to Pi, it is extremely important to use Pi-free labware and reagents.
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文献和实验肺炎链球菌 肺炎链球菌（Streptococcus pneumoniae）简称肺炎球菌（pneumococcus）。1881年首次由巴斯德（Louis Pasteur）及G. M. Sternberg分别在法国及美国从患者痰液中分离出医学教育`网搜集整理。为革兰染色阳性，菌体似矛头状，成双或成短链状排列的双球菌，有毒株菌体外有化学成分为多糖的荚膜。5%～10%正常人上呼吸道中携带此菌。有毒株是引起人类疾病的重要病原菌。
细胞沿一个平面分裂，常排列成链状的细菌。革兰氏染色阳性，但在陈旧培养基或脓液标本中常呈阴性。广泛分布于自然界。分为致病性和非致病性两大类。根据在血琼脂培养基上的溶血特征可分为三种不同类型：甲型（α）溶血性链球菌又称草绿色链球菌，菌落周围出现草绿色溶血环，通常寄居在人的口咽腔、呼吸道及肠道中，致病力弱。乙型（β）溶血性链球菌产生强烈的溶血毒素，在血琼脂培养基上，可使菌落周围出现宽2～4毫米、界限分明、无色透明的溶血环，致病力强，能引起人类多种疾病、根据抗原构造不同，又分成
0.6— 0.8微米左右的小形球菌。是以连接成链状为特征的一属细菌。其链是以一对球菌为单位呈纵向排列，因种类的不同，大部分是呈单球菌或双球菌样。有时也由于培养条件而造成该种状态。有人把肺炎球菌也划归为此属。它们通常不运动，不产生芽孢，革兰氏阳性。许多是属兼性厌氧性菌或厌氧性菌。寄生在人类和哺乳动物的粘膜上，即咽喉和肠道等处，在合成培养基上生长不良，一般多在血琼脂上培养。链球菌具有全面与乳酸菌相近的性质，多数链球菌除能进行乳酸发酵外，还或多或少地进行肠细菌类型的发酵。链球菌最初由 F．
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