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  • PMA(疊氮溴化丙錠), 20 mM in water

    產(chǎn)品貨號: P4051

    產(chǎn)品規(guī)格: 100 μL

    目錄價(元):1061

    大包裝詢價


產(chǎn)品概述:

產(chǎn)品介紹

PMA是一種高親和性的dsDNA結(jié)合染料,該染料本身具有微弱的熒光,但與核酸結(jié)合后可以發(fā)出更為明亮的熒光。PMA不具有細胞膜滲透性,因此可選擇性地修飾膜受損的死細胞的 DNA。PMA修飾的DNA經(jīng)光解后,PMA上的光反應性疊氮基轉(zhuǎn)化為高反應性氮烯自由基,與DNA結(jié)合位點附近的任何烴部分反應形成穩(wěn)定的共價氮碳鍵,從而導致永久性 DNA 修飾(圖1),從而抑制死細胞DNA的擴增。該修飾過程還會使DNA沉淀,并使其在隨后的基因組DNA提取過程中與細胞碎片一起丟失,進而阻礙死細胞中目標DNA的PCR擴增。殘留在溶液中未結(jié)合的PMA,會在強光照射下與水分子反應分解成無交聯(lián)活性的羥胺化合物無法共價結(jié)合DNA,從而不影響PCR擴增。PMA通過純化去除修飾DNA 以及抑制修飾DNA擴增的組合特性使得其可以通過實時定量PCR(qPCR)的手段,檢測多種樣本類型包括:細菌、生物膜、酵母、真菌、病毒和真核細胞。PMA與qPCR、NGS、Sanger測序和LAMP技術(shù)相結(jié)合,可廣泛應用與食品與環(huán)境安全監(jiān)測領域。

圖1. PMA修飾DNA后通過qPCR定量活菌和死菌的原理

應用范圍

食品/環(huán)境中有害菌或者致病菌的定量檢測


產(chǎn)品貨號

P4051


儲運條件

-20℃避光保存,有效期見外包裝。冰袋運輸。


產(chǎn)品參數(shù)

外觀:橙紅色液體

Ex (pH 3) = 464 nm (before photolysis)

Ex /Em (after photocrosslinking to nucleic acid) = 510/610 nm

分子式:C27H32Cl2N6

分子量:511.5


注意事項

1. 本產(chǎn)品屬于熒光染料,使用及保存過程中需注意避光。

2. 本產(chǎn)品僅限于科研,不得用于臨床診斷或治療,不得用于食品或藥品,不得存放于普通住宅內(nèi)。

3. 為了您的安全和健康,請穿實驗服并戴一次性手套操作。




說明書:


 P4051    

使用本產(chǎn)品的文獻:


參考文獻
1.Detection and quantification of viable Bacillus cereus group species in milk by propidium monoazide quantitative real-time PCR
應用方向:Bacillus cereus(蠟樣芽孢桿菌)

2.Persistence of Bacteroides ovatus under simulated sunlight irradiation
應用方向Bacteroides ovales(卵巢桿菌)

3.Advantageous Direct Quantification of Viable Closely Related Probiotics inPetitSuisse Cheeses under In Vitro Gastrointestinal Conditions by Propidium Monoazide - qPCR
應用方向Bifidobacterium animalis(動物雙歧桿菌)

4.Assessing the diagnostic importance of nonviable bacterial cells in respiratory infections
應用方向Burkholderia cepacia(赤胸鯊)

5.Impact of oxidative stress defense on bacterial survival and morphological change in Campylobacter jejuni under aerobic conditions
應用方向Campylobacter jejuni(空腸彎曲菌)

6.Viability-PCR Shows That NAAT Detects a High Proportion of DNA from Non-Viable Chlamydia trachomatis
應用方向Chlamydia trachomatis(沙眼衣原體 )

7.Digestibility and prebiotic properties of potato rhamnogalacturonan I polysaccharide and its galactose-rich oligosaccharides/oligomers
應用方向Clostridium leptum(瘦肉梭菌)

8. Survival and persistence of host-associated Bacteroidales cells and DNA in comparison with Escherichia coli and Enterococcus in freshwater sediments as quantified by PMA-qPCR and qPCR
應用方向Enterrococcus spp(腸球菌屬)

9.Detection of viable Escherichia coli O157:H7 in ground beef by propidium monoazide real-time PCR
應用方向Escherichia coli(大腸桿菌)

10.Viability determination of Helicobacter pylori using propidium monoazide quantitative PCR
應用方向Helicobacter pylori(幽門螺桿菌)

11.Probiotic bacteria survive in Cheddar cheese and modify populations of other lactic acid bacteria
應用方向Lactobacillus acidophilus(嗜酸乳桿菌)

12.Fate of Viable but Nonculturable Listeria monocytogenes in Pig Manure Microcosms
應用方向Listeria monocytogenes(單球菌)

13.A multicenter study of viable PCR using propidium monoazide to detect Legionella in water samples
應用方向Legionella pneumophila(嗜肺軍團菌)

14.Propidium monoazide and Xpert MTB/RIF to quantify Mycobacterium tuberculosis cells
應用方向Mycobacterium tuberculosis(結(jié)核分枝桿菌)

15.Determination of the effects of medium composition on the monochloramine disinfection kinetics of Nitrosomonas europaea by the propidium monoazide quantitative PCR and Live/Dead BacLight methods
應用方向Nitrosomonas europae(歐洲硝酸銨)

16.Study and Understanding Behavior of Alginate-Inulin Synbiotics Beads for Protection and Delivery of AntimicrobialProducing Probiotics in Colonic Simulated Conditions
應用方向Pediococcus acidilactici(酸乳球菌)

17.Quantification of Pseudomonas aeruginosa in multispecies biofilms using PMA-qPCR
應用方向Pseudomonas aeruginosa(銅綠假單胞菌)

18.Multiplex PCR coupled with propidium monoazide for the detection of viable Cronobacter sakazakii, Bacillus cereus, and Salmonella spp. in milk and milk products
應用方向Salmonella enterica(腸炎沙門菌)

19.Peptoid Efficacy against Polymicrobial Biofilms Determined by Using Propidium Monoazide-Modified Quantitative PCR
應用方向Staphylococcus aureus(金黃色葡萄球菌)

20.Method to quantify live and dead cells in multi-species oral biofilm by real-time PCR with propidium monoazide
應用方向Streptococcus oralis(口腔鏈球菌)

21. OxyRactivated expression of Dps is important for Vibrio cholerae oxidative stress resistance and pathogenesis
應用方向Vibrio cholerae(霍亂弧菌)

22. A New Physiological Role for the DNA Molecule as a Protector against Drying Stress in Desiccation-Tolerant Microorganisms
應用方向Microbacterium 3J1(微桿菌3J1)

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