The DetectX® Retinol Binding Protein (RBP) Multi-Format ELISA Kit is designed to allow for the measurement of both high and low RBP levels in a variety of samples including dried blood spots, serum, EDTA and heparin plasma and urine with the same kit. The kit uses native human RBP as a standard. Standards or diluted samples are added to a coated microtiter plate along with a RBP-peroxidase conjugate and the binding reaction initiated by addition of a RBP-specific sheep antibody. After a 60-minute incubation, the plate is washed and TMB substrate solution added. After 30 minutes, the color development is stopped and the intensity of the generated signal is read at 450nm.
Retinol binding protein (RBP) is from a family of structurally related proteins that bind small hydrophobic molecules such as bile pigments, steroids, odorants, etc. RBP is a 21 kDa highly conserved, single-chain glycoprotein, consisting of 182 amino acids with 3 disulfide bonds, that has a hydrophobic pocket which binds retinol. In urine RBP has been shown to be a useful marker for renal function as it is totally filtered by the glomeruli and reabsorbed by proximal tubules. This has made RBP a tool to study renal function in heart or kidney transplant recipients, type 1 and 2 diabetics, and in people exposed to uranium from mining operations. Modulating RBP4 levels may lead to new strategies in treating type 2 diabetes
When in serum, the majority of RBP bound with retinol is reversibly complexed with transthyretin. This complex transports retinol to specific receptors of various tissues in the body. Vitamin A status is reflected by serum concentration as it is homeostatically controlled and does not fall until stores are drastically reduced. RBP has been shown to be a useful surrogate marker for retinol because of the correlation between retinol and RBP in serum, which implies that RBP may be used to monitor vitamin A deficiency (VAD). The WHO has estimated that 250 million children have moderate to severe VAD due to lack of adequate nutrition, and the rising cost of food staples around the world further exacerbates this problem. In addition to nutritional deficiencies, infectious stresses have been shown to depress retinol concentrations and individuals with diseases such as cystic fibrosis and HIV-1 also run the risk of VAD due to the infectious stresses that contribute to the disease. Measurement of RBP levels has also been useful in detection and characterization of diseases including hypertension and certain cancers, among other conditions.
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百奥森18分钟霉菌毒素检测试剂盒，有需要的可以了解下！多种规格型号可供选择
产品名称
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牛胰岛素,是一种多肽
在1965年9月17日我国完成了结晶牛胰岛素的全合成。经过严格鉴定，它的结构、生物活力、物理化学性质、结晶形状都和天然的牛胰岛素完全一样。这是世界上第一个人工合成的蛋白质，为人类认识生命、揭开生命奥秘迈出了可喜的一大步。这项成果获1982年中国自然科学一等奖。
1953年，英国人F. SangerSanger由于测定了牛胰岛素的一级结构而获得1958年诺贝尔化学奖。
我用Promega公司的双荧光素酶检测试剂盒（E2920）检测到的firefly萤光素酶活性很低，只有4*10的3次方；海肾萤光素酶活性有10的6次方。
我用Ad293细胞做了转染，fireflyluciferase质粒：RanillaLuciferase质粒=0.1ug：0.025ug/一个孔（96孔板），共转染了二天，再进行双萤光素酶检测。
我想了解fireflyluciferase活性用promega的这个E2920-双萤光素酶试剂盒检测得到10的3次方，这种数值正常吗？
我做了3次重复实验，每次firefly萤光素酶活性很低，只有4*10的3次方；而海肾萤光素酶活性有10的6次方。
求指教？fireflyluciferase活性低？会是什么原因呢？
实验室要开展支原体检测，方法是PCR法，先要采购试剂盒，用过的同学给推荐一下好用的品牌呗
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