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Why is there RNA in the DNA eluate when using the AllPrep DNA Mini Spin Column?
FAQ ID -1044
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Why is there no vacuum-only protocol for the RNeasy Plus 96 Kit?
FAQ ID -1993
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Why is there no QuantiTect Primer Assay for my gene of interest?
FAQ ID -1140
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Why is there no male DNA obtained from sexual assault samples?
FAQ ID -
143767
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Why is there no detection of free reporter fluorescence in the LiquiChip System?
FAQ ID -732
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Why is there more than one QIAgene for my gene of interest?
FAQ ID -2044
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Why is there DNA in the no-template control reaction when using the standard REPLI-g procedure, but not when using the UltraFast procedure?
FAQ ID -1327
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Why is there DNA in the no-template (negative) control when using the QuantiTect Whole Transcriptome Kit?
FAQ ID -1620
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Why is there an asterisk for my miScript Primer Assays?
FAQ ID -2176
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Why is there a need to overlay the resuspended DNA pellet with PRS again (step 17 of QSP)?
FAQ ID - 3951
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Why is the Type-it Mutation Detect PCR Kit recommended for preamplification of SNPs?
FAQ ID -2067
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Why is the storage time for QuantiFast PCR Kits shorter than that for QuantiTect PCR Kits?
FAQ ID -1446
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Why is the RT step with the QuantiFast RT Kits much shorter compared to QuantiTect RT Kits?
FAQ ID -1451
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Why is the reaction volume for QuantiFast PCR Kits lower than that for QuantiTect PCR Kits?
FAQ ID -1447
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Why is the QuantiFast denaturation step different for PCR and RT-PCR runs in the two-step protocol for the ABI 7500 and other cyclers?
FAQ ID -1442
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Why is the qRT-PCR reproducibility so critical when detecting gene expression knock down in an RNAi experiment?
FAQ ID -2774
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Why is the QIAcube Connect App reacting so slowly?
FAQ ID - 141519
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Why is the QIAamp Viral RNA Mini Kit (50) currently unavailable?
FAQ ID -147395
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Why is the pQE DNA provided in QIAexpress Kits blue in color?
FAQ ID -487
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Why is the Phoenix Hot Start Taq sometimes cloudy upon removing from -20°C storage?
FAQ ID - 3906
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Why is the initial activation step different for Rotor-Gene Probe, SYBR Green and Multiplex Kits?
FAQ ID -2118
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Why is the fluorescence signal of the Internal Control on my Rotor-Gene Q very low?
FAQ ID -2574
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Why is the final heat denaturation step so important with the QIAsymphony PAXgene Blood RNA protocol?
FAQ ID -2987
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Why is the copy number call lower than expected?
FAQ ID — 3413
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Why is the activation time for HotStarTaq Plus Polymerase in the QuantiFast SYBR Green Kits different from that for QuantiFast Probe Kits?
FAQ ID -1449
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Why is special Type-it Fast SNP Probe PCR chemistry required for TaqMan® SNP Genotyping?
FAQ ID -2057
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Why is my plasmid DNA yield low?
FAQ ID -768
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Why is my no template control (NTC) real-time Ct value < 35 cycles in my qPCR Assay?
FAQ ID -2686
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Why is my EpiTect Methyl qPCR Assay "failed" as indicated in the QC page of the data analysis Excel file?
FAQ ID -2734
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Why is my 260/280 ratio low after using the DNeasy mericon Food Kit?
FAQ ID - 3349
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Why is maximum amplicon size for the Type-it Microsatellite PCR Kit limited to 500 bp?
FAQ ID -2060
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Why is it recommended to add 1 mM IPTG for optimal protein yields using the EasyXpress Protein Synthesis Kits?
FAQ ID -860
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Why is it not recommended to stabilize cells with RNAprotect Tissue Reagent?
FAQ ID -941
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Why is EvaGreen instead of SYBR Green used as fluorescent dye in the Type-it HRM PCR Kit?
FAQ ID -2196
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Why is DTT used only for semen samples?
FAQ ID -
143761
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Why is CoralLoad included in the Type-it Mutation Detect, but not in the Type-it Microsatellite PCR Kit?
FAQ ID -2068
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Why is carrier RNA used during the isolation of gDNA from microdissected samples with the QIAamp DNA Micro Kit?
FAQ ID -473
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Why is an ice-incubation step included during reaction set-up when following the QuantiTect RT-PCR but not the QuantiTect PCR protocol.
FAQ ID -283
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Why is a blood collection set required to collect blood into the PAXgene Blood ccfDNA Tube?
FAQ ID - 3628
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Why is a blood collection set required to be used with the PAXgene Blood RNA tube?
FAQ ID - 3459
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Why is a 2-step (and not a 3-step) cycling protocol recommended for Rotor-Gene SYBR Green Kits?
FAQ ID -2122
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Why is a 2-step (and not a 3-step) cycling protocol recommended for QuantiFast SYBR Green PCR Kits?
FAQ ID -1450
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Why is 18S ribosomal RNA (rRNA) used as a housekeeping gene to normalize sample-to-sample, systematic variation in qPCR assays?
FAQ ID -2675
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Why have the hazard symbols accompanying products changed?
FAQ ID - 3430
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Why had my RT² SYBR Green Mastermix been working well in the past, but now does not seem to be?
FAQ ID -2717
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Why does the upper aqueous phase look pinkish when purifying RNA from fatty tissue?
FAQ ID -3118
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Why does the template for EasyXpress Disulfide Insect Kits need to have a signal sequence (such as the mellitin signal sequence as provided by the EasyXpress Linear Template Fab Kit primers)?
FAQ ID -2967
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Why does the SeqTarget Prep Protocol require a 2-step procedure?
FAQ ID -2238
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Why does the QuantiTect Primer Assay for my gene of interest have only one version number?
FAQ ID -1134
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Why does the QIAcube sometimes fail to pick up the tips or pick up wrong tips?
FAQ ID -3131
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Why does the QIAamp DNA Mini Tissue Protocol require both ATL and AL buffer, while the Blood Protocol only uses AL?
FAQ ID -633
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Why does the miScript Target Protector not induce the degradation process?
FAQ ID -2263
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Why does the DNeasy mericon Food Kit use a QIAquick column and Buffer PB rather than a DNeasy column and Buffer AL, which might be expected since the kit isolates genomic DNA?
FAQ ID - 3347
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Why does the DNeasy mericon Food extraction kit use a QIAquick column and not DNeasy column?
FAQ ID -3148
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Why does the copy function not apply relative to migration time and normalized area values after loading the DNA size marker table and adding the alignment marker peaks on the QIAxcel System?
FAQ ID -1832
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Why does the connection test fail?
FAQ ID - 141522
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Why does the Allprep DNA/RNA 96 Kit use Buffer RLT, whereas the AllPrep DNA/RNA Mini Kit uses Buffer RLT Plus?
FAQ ID -1999
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Why does TA/UA cloning work with your proofreading HotStar HiFidelity DNA Polymerase?
FAQ ID -1053
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Why does my realtime PCR assay quality decrease over time?
FAQ ID -589
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Why does my purified DNA/RNA sometimes have a 260/280 or 260/230 ratio of more than 2? Does that mean the purity is poor?
FAQ ID -3132
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Why does my PCR product show up later when comparing the QuantiTect SYBR Green PCR Kits with Roche kits using the same annealing temperature?
FAQ ID -1083
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Why does my isolated RNA have a low OD 260/280 ratio?
FAQ ID -97
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Why does my DNA sample float out of the slot when loading it onto an agarose gel?
FAQ ID -205
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Why does AllPrep DNA/RNA/Protein Mini kit use buffer RLT, but Allprep DNA/RNA Mini and Allprep DNA/RNA Micro kits use buffer RLT Plus? Are these buffers interchangeable?
FAQ ID - 3391
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Why do you recommend using Triton X for the purification of 6xHis-tagged protein?
-100
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Why do the Internal Control templates for extraction (Internal Control DNA or RNA [High conc.]) have a 10x higher concentration than the IC templates provided with the QuantiFast Pathogen PCR +IC Kit and the QuantiFast Pathogen RT-PCR +IC Kit?
FAQ ID -2603
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Why do replicates in real-time PCR have different plateau heights?
FAQ ID -539
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Why do QuantiFast SYBR Green PCR Kits require such a high primer concentration?
FAQ ID -1443
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Why do qBiomarker Copy Number PCR Arrays have assays in quadruplicate?
FAQ ID — 3414
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Why do pQE-T7 vectors of the QIAgenes E. coli system have an additional UAG amber stop codon?
FAQ ID -2043
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Why do my qPCR amplification curves or plots decrease in fluorescence intensity after the saturation phase?
FAQ ID -2689
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Why do melting temperatures differ between PCR fragments amplified with QIAGEN's QuantiTect SYBR Green PCR Kits and Roche Kits?
FAQ ID -1084
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Why do I sometimes get light blue colonies when using the QIAGEN PCR Cloning Kit?
FAQ ID -603
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Why do I see multiple high-intensity peaks in my qPCR dissociation curve at temperatures less than 70 ºC?
FAQ ID -2690
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Why do I see low, poor, or sub-standard amplification efficiency in my qRT-PCR assay?
FAQ ID -2695
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Why do I observe a CT shift for the Internal Control in some samples in comparison to the CT value for the Internal Control of the dilution series of the Male Control DNA M1?
FAQ ID - 3745
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Why do I need to identify my real-time instrument model when placing my order for RT² qPCR Primer Assays?
FAQ ID -2713
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Why do I need normalization using Rotor-Gene ScreenClust HRM Software?
FAQ ID -2198
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Why do I have wavy DNA bands on my agarose gel?
FAQ ID -2260
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Why do I have to use an ACS (Assay Control Set)?
FAQ ID -2933
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Why do I have to add beta-mercaptoethanol (beta-ME) to lysis Buffer RLT of the RNeasy Kits?
FAQ ID -101
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Why do I get smeared PCR products?
FAQ ID -87
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Why do I get genomic DNA contamination in my plasmid prep?
FAQ ID -353
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Why do I get amplification in a negative control DNA tube using the REPLI-g Kit for WGA?
FAQ ID -675
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Why do casework-sample protocols for the QIAsymphony DNA Investigator Kit start with different lysate volumes (200 µl, 500 µl, or 1000 µl)?
FAQ ID -2035
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Why did you choose ORF1a+ORF1b and ORF3a+ORF7a?
FAQ ID - 3893
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Why did you choose MAPK1 as a positive control in the QIAGEN RNAi Human/Mouse Control Kit?
FAQ ID -604
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Why did we not choose commonly used genes such as the S gene, E gene, or RdRP?
FAQ ID - 3892
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Why did the real-time PCR yield Ct values < 12?
FAQ ID -2727
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Why can’t I see my QIAcube Connect instrument in the QIAcube Connect App?
FAQ ID - 1414518
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Why can't I find the DNA methylation qPCR Assay for my gene of interest?
FAQ ID -2743
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Why can I not find the QuantiTect Primer Assay in GeneGlobe that I had previously ordered from QIAGEN?
FAQ ID -1138
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Why can I not find the Q-Base device in the device list during the first installation?
FAQ ID - 141516
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Why are two reagents used in the PAXgene Tissue System?
FAQ ID -3022
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Why are two reagents used in the PAXgene Tissue System?
FAQ ID - 3603
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Why are there various different QuantiTect Primer Assays for my gene (previous versions, transcript variants)?
FAQ ID -1133
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Why are there various different QuantiFast Probe Assays for my gene (previous versions, transcript variants)?
FAQ ID -2366
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Why are the RT² qPCR Primer Assays not designed to cross exon-intron junctions or boundaries?
FAQ ID -2710
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Why are the QuantiTect and QuantiFast Multiplex PCR Kits limited to triplex real-time PCR on some cyclers?
FAQ ID -715
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Why are the QuantiFast Probe Assays located on a single exon, thereby also detecting genomic DNA?
FAQ ID -2365
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