![SMOBIO/[DM2000] AccuBand™ 100 bp DNA Marker II, 500 μl/500 μl/DM2000](images/SMOBIO/image.png)
Description
AccuBand™ 100 bp DNA marker II is composed of 6 individual DNA fragments, presenting 2k, 1k, 750, 500, 250 and 100 bp sharp bands respectively. This product contains 1 enhanced band (750 bp) for easy identification of bands. AccuBand™ 100 bp DNA marker II is ready-to-use, containing loading buffer with tracking dyes of dual colors (orange and cyan). To improve the faint visibility of low molecular weight bands frequently occurred in use of conventional DNA markers, AccuBand™ 100 bp DNA marker II provides sufficient amount of DNA for 250 and 100 bp fragments, and thus ensuring clear observation of all DNA bands ranging from 100 bp to 2k bp, either in agarose gel or in polyacrylamide gel electrophoresis.
Features
Sharp bands
Suitable for polyacrylamide gel electrophoresis
Quick reference— enhanced bands
Ready-to-use— premixed with loading dye for direct loading
Stable— room temperature storage over 6 months
Source
Phenol extracted PCR products and dsDNA digested with specific restriction enzymes, equilibrated in 10 mM Tris-HCl (pH 8.0) and 10 mM EDTA.
Range
100 ~ 2,000 bp
Concentration
45.5 µg/ 500 µl
Recommended loading volume
5 µl/ well
Storage
Room temperature for 6 months4°C for 12 months -20°C for 36 months
Specification
Cat. No. | DM2000 |
Series Name | AccuBand™ |
Product Size | 500 μl |
Size Range | 100 – 2000 bp |
Band Number | 6 |
Tracking Dye | Orange G and Xylene cyanol FF |
Enhanced Band | 750 bp |
Manual
Manual_DM2000_AccuBand™ 100 bp DNA Marker II
SDS
SDS_DM2000
Are the DNA markers/ladders produced by SMOBIO sufficient in quantity?
Yes, all the DNA markers of SMOBIO have been passed in the QC processes including repeated optical density measurements to ensure the quantity of total DNA.
Are the SMOBIO"s DNA markers/ladders compatible to radio-labeling (for example, label DNA with T4 Polynucleotide Kinase)?
We do not recommend to do the labeling reaction directly.
The reasons are as follows:
Our DNA marker is pre-mixed with loading buffer that contains Tris-HCl, EDTA, and glycerol, may affect radio-labeling.
Our DNA marker is a mixture of PCR products and restriction enzyme digested DNA fragments. Digested dsDNA may still have phospho-group on their 5" end.
To enhance the efficiency of the labeling reaction, here are two steps suggested being done prior to the labeling reaction:
Purify DNA marker by EtOH precipitation or DNA purification kits to remove loading buffer.
Remove phospho-group by using phosphatase, ex CIAP (Calf intestinal alkaline phosphatase)
Are SMOBIO"s DNA markers/ladders suitable to use in DNA PAGE?
SMOBIO"s AccuBand™ series DNA markers (DM1200, DM2000, DM2200 and DM2400) are suitable for DNA PAGE.
Why DNA markers/ladders are resolved two bands at the same size when using high percentage agarose or polyacrylamide gel?
DNA fragments with identical in size are indistinguishable on agarose gels, but, on acrylamide gels, even slight differences in DNA sequence can lead to noticeably different migration rates. To provide increased intensity of DNA marker/ladder bands, multiple DNA fragments with identical in size but different in DNA sequences are used. SMOBIO"s AccuBand™ series DNA markers (DM1200, DM2000, DM2200 and DM2400) are more suitable for DNA PAGE.
Are SMOBIO"s DNA markers/ladders suitable to use in denaturing DNA PAGE?
SMOBIO"s AccuBand™ series DNA markers (DM1200, DM2000, DM2200 and DM2400) are suitable for DNA PAGE.
SMOBIO"s AccuBand™ DNA markers are not at denatured form, therefore, you need to denature DNA ladder by yourself.
Here is the protocol to denature DNA ladder:
Mix 5 μL of DNA Ladder with an equal volume of denaturing solution [95% (v/v) formamide, 10 mM EDTA (pH 8.0), 0.1% (w/v) bromophenol blue, 0.1% (w/v) xylene cyanol].
Incubate at 70°C for 5 minutes.
Electrophorese the sample in a denaturing polyacrylamide/urea gel
The conserved basic residues and the charged amino acid residues at the α-helix of the zinc finger motif regulate the nuclear transport activity of triple C2H2 zinc finger proteins
Chih-Ying Lin, Lih-Yuan Lin PLoS One. 2018; 13(1): e0191971. Published online 2018 Jan 30. doi: 10.1371/journal.pone.0191971
PMCID: PMC5790263
Transposable elements generate population-specific insertional patterns and allelic variation in genes of wild emmer wheat (Triticum turgidum ssp. dicoccoides)
Katherine Domb, Danielle Keidar, Beery Yaakov, Vadim Khasdan, Khalil Kashkush BMC Plant Biol. 2017; 17: 175. Published online 2017 Oct 27. doi: 10.1186/s12870-017-1134-z
PMCID: PMC5659041
ExcelBand™ DNA Ladder series
FluoroBand™ DNA Ladder series
AccuBand™ DNA Marker series
FluoroVue™ Nucleic Acid Gel Stain
Excellent for in-gel staining
Sensitivity up to 0.14 ng DNA or 1 ng total RNA
A safer alternative to EtBr
Suitable to blue or UV light
FluoroStain™ DNA Fluorescent Staining Dye
Excellent for post staining
Sensitivity up to 0.04 ng DNA
A safe alternative to EtBr
Suitable for blue or UV light
FluoroDye™ DNA Fluorescent Loading Dye
Excellent for premix with DNA sample
Sensitivity up to 0.14 ng DNA
Safety dye
Convenience - monitor the electrophoresis in real-time
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脂质的生物学功能有1、脂肪氧化分解释放能量
2、复合脂质和衍生脂质是构成细胞的成分
3、促进脂性维生素的吸收
4、脂肪防震和隔热保温作用
5、脂肪的氧化利用具有降低蛋白质和糖消耗的作用
如磷脂含P,维生素D含N.脂肪只含C、H、O三种元素.
向左转|向右转
1.体内储存和提供能量（体内1克脂肪产生的能量大约9千卡）
2.维持体温正常（皮下脂肪还可以起到隔热保温作用）
3.保护作用（脂肪组织在体内对器官有支撑和衬垫作用，保护内部器官免受外力伤害）
4.内分泌作用（由脂肪分泌的银子有瘦素、肿瘤坏死因子、白细胞介素-6、脂联素及抵抗素等参与机体代谢、免疫、生长发育等生理过程）
5.帮助机体更有效低利用碳水化合物和节约蛋白质作用（节约蛋白质作用）
6.机体重要的构成成分（比如细胞膜脂质双分子层）
食物中的脂肪营功能：
除给人体提供能量和脂肪合成材料外，还有营养学功能：增加饱腹感；改善食物感官性状；提供脂溶性维生素。此外为人体提供必需脂肪酸。
缺乏时的症状：
一般情况不会有单纯的脂肪缺乏，除非像非洲难民似的遭遇饥荒（其实是很多食物的匮乏导致的结果）。脂肪缺乏表现为消瘦，怕冷，免疫力低下，生长发育缓慢等。
必需脂肪酸缺乏症状供参考：生长迟缓、生殖障碍、皮肤损伤（出现皮疹等）以及肾脏、肝脏、神经和视觉方面多种疾病。
脂肪的来源：动物的脂肪组织和肉类以及植物的种子。
有些是类固醇化合物（甾体激素），有些事脂肪酸衍生物
类固醇激素例如：肾上腺皮质激素、性激素等。
脂肪酸衍生物例如：前列腺素等。
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原文链接：http://www.medpagetoday.com/Rheumatology/Arthritis/42192
ErosiveHandOALinkedtoLipids
Erosiveosteoarthritis(OA)ofthehandisasevereformofrADIographichandOA,ratherthanadistinctclinicalentity,andmaybedrivenbythepresenceofmetabolicabnormalities,researchersreported.
ThepatternofjointinvolvementinerosiveOAwassimilartothatseeninseverenon-erosivedisease,particularlyforsymmetry,withanadjustedoddsratioof6.5(95%CI3-14.1)forinvolvementofthesamejointintheoppositehand,accordingtoMichelleMarshall,PhD,ofKeeleUniversityinStaffordshire,England,andcolleagues.
ButindividualswitherosivehandOAhadmorethantwicetheriskofmetabolicsyndrome(OR2.7,95%CI1-7.1)andmorethanfourtimestheriskofdyslipidemia(OR4.7,95%CI2.1-10.6)comparedwithpatientswhohadseverenon-erosiveOA,theresearchersreportedonlineinAnnalsoftheRheumaticDiseases.
ErosivehandOAdiffersfromnon-erosivediseaseinseveralways.Forinstance,theonsetofsymptomssuchasswelling,stiffness,andpaintendstobeabrupt,andradiographsreveal"gull-wing"or"saw-tooth"deformitiesandcollapseofthesubchondralbone.
Followingapparentwideningofthejointspace,remodelingoccurs,resultingintheappearanceoflargeosteophytesandanirregularsubchondralplate.
Andoverall,worseclinicalandradiographicoutcomes--alongwithsystemicriskfactors--havebeenreportedforerosiveOA.
ButthecauseandpathogenicprocessesassociatedwitherosiveOAhavenotbeenfullyestablished,andtheEuropeanLeagueAgainstRheumatismhassuggestedthaterosivediseasemaybeasubsetofgeneralizedhandOA.
TodeterminewhethererosivehandOAactuallyisaseparateentityorpartofacontinuumofseverityandtoidentifypotentialriskfactors,MarshallandcolleaguesrecruitedpatientsfromaclinicalassessmentstudyofhandOAandalsofromastudyofkneeOAtoprovidealarger,enrichedsample.
Allparticipantsreportedhandpainandstiffnessforatleast"afew"dayswithinthepastmonth.
X-raysofthehandswerescoredaccordingtotheKellgrenandLawrence(KL)system,andthepresenceoferosivechangeswasevaluatedaccordingtotheVerbruggen-Veysprogressionscale.
Atotalof1,167patientsand8,608handjointswereincludedintheanalysis.
OntheKLgradingscale,1,754jointsweregrades2orhigher,indicatingpossIBLeordefiniteosteophytesandnarrowingofthejointspace.
Moderate-to-severeKLscoresof3orhigherwerefoundin425joints,indicatingthepresenceofmultipleosteophytes,jointspacenarrowing,sclerosis,andpossiblebonedeformities.
Severescoresof4,withlargeosteophytes,markedjointspacenarrowing,severesclerosis,anddefinitebonedeformitieswerefoundin112joints.
Erosivediseasewasidentifiedin207jointsin80patients.
Theseconddistalinterphalangealjointwasmostoftenaffected,andsignificantassociationswerefoundfortheoverallrankedorderofinvolvedjointsinbotherosiveandnon-erosiveOA(r>0.95).
Aswithsymmetry,thepatternofinvolvementacrossthejointsofthesamehandandthesamefingerwassimilarforbotherosiveandnon-erosivedisease.
Patientswitherosiveandnon-erosivediseaseweresimilarinmanycharacteristics,includingage,sex,thepresenceofkneeOA,afamilyhistoryofarthritis,andbodymassindex.Themaindifferencewasinthepresenceofdyslipidemiaandmetabolicsyndrome.
Amongpatientswithnon-erosiveKL3,atotalof6.2%hadabnormallevelsofcholesterol,asdid8.8%ofthosewithnon-erosiveKL4.
Incontrast,21.2%ofthosewitherosivediseasehadlipidabnormalities.
AndforpatientswithKL3and4,ratesofmetabolicsyndromewere4.1%and2.9%,respectively,whiletheratewas11.2%forthosewitherosivedisease.
Thepatternsofinvolvementinthehandjointssuggestthatthereare"strongsimilarities"betweenerosiveOAandmoderate-to-severenon-erosiveOA,andmayrepresentanevolutionmediatedthroughmetabolicpathways,theresearchersexplained.
"Theexactmechanismisnotyetknownbutosteoarthritisisbelievedtosharesimilarbiochemicalandinflammatorypathwaystometabolicdisorders,anddyslipidemiamayalterlipidmetabolisminanumberofjointtissues,"theywrote.
Alimitationofthestudywastherelativelysmallnumberofpatientswitherosivedisease.
脂类，由脂肪酸和醇作用生成的酯及其衍生物统称为脂类，这是一类一般不溶于水而溶于脂溶性溶剂的化合物。
脂肪：存在于人体和动物的皮下组织及植物体中，是生物体的组成部分和储能物质。
脂类所指代的一类物质较脂肪更广。而酯类则是从化学角度来看物质世界，有不少是化工原料。有些酯类是脂肪的构成成分。
如上所述，脂类包括脂肪酸（多是4碳以上的长链一元羧酸）和醇（包括甘油醇、硝氨醇、高级一元醇和固醇）等所组成的酯类及其衍生物。包括单纯脂类、复合酯类及衍生脂质。
脂肪是指人体或动物体内的、由一分子甘油和三分子脂肪酸结合而成的甘油三酯。
酯类是指酸（羧酸或无机含氧酸）与醇起反应生成的一类有机化合物。低分子量酯是无色、易挥发的芳香液体，如：如乙酸乙酯CH3COOC2H5、乙酸苯酯CH3COOC6H5、苯甲酸甲酯C6H5COOCH3等；高级饱和脂肪酸单酯常为无色无味的固体，高级脂肪酸与高级脂肪醇形成的酯为蜡状固体。所以，酯类与脂类不可替代使用。
后来加PEG沉淀效果很好，上清夜很清，但是不知道会不会对后期测效价，纯化等有影响。
有没有别的简便方法可以去除脂类？
哪位高手指教一下，感激不尽。
