Shop All RNAi Positive Controls

Silencer™ GAPDH siRNA (human, mouse, rat) (Invitrogen™)

Ambion® Silencer® GAPDH Positive Control siRNA (human, mouse, rat) is ideal for developing and optimizing siRNA experiments. The control is validated for use in human, mouse, and rat cell lines. 5 tubes of 40 nmol each are provided.
• Validated siRNA controls for optimizing siRNA experiments
• Functionally tested in several common cell lines
• HPLC purified, duplexed, and ready to use Silencer® control siRNAs are unmodified 21-mers; they are designed to be used with Silencer® siRNAs, BLOCK-iT™ siRNAs, and other unmodified 21mer siRNAs. If you are using other siRNA products, such as Ambion® Silencer® Select siRNAs or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.

Silencer™ Cy™3-labeled GAPDH siRNA (human, mouse, rat) (Invitrogen™)

Ambion® fluorescently labeled control siRNA for the easy monitoring of siRNA uptake by fluorescence microscopy along with siRNA-induced knockdown. Purified, annealed, and ready to use, the 5 nmol aliquot is supplied in a stable, dried format.

• Fluorescently labeled siRNAs simplify the monitoring of siRNA delivery
• Ideal for correlating siRNA uptake with mRNA knockdown
• Functionally tested in several common cell lines
• HPLC purified, duplexed, and ready to use

Visualize siRNA Uptake with Labeled siRNAs
Fluorescent labeling of siRNAs allows direct observation of their cellular uptake, distribution, and localization. Fluorescently labeled siRNAs are commonly used to monitor transfection efficiency during optimization of transfection conditions. In general, siRNAs are rapidly taken up by and distributed throughout cells in as little as 4 hours.

Correlate siRNA Uptake with Gene Silencing
Studies show that the silencing activity of Silencer® Cy™3 Labeled GAPDH siRNA is not affected by the fluorescent label. Therefore, these siRNAs are ideal for examining both siRNA uptake and siRNA-induced knockdown, and for correlating gene knockdown with transfection efficiency; this is important to know because different transfection reagents interact with siRNAs in different ways (i.e., some reagents may sequester the siRNA, resulting in poor gene knockdown). The Silencer® Cy™3 Labeled GAPDH siRNA has the fluorescein derivative Cy™3 (excitation max. = 547, emission max. = 563 nm) on the 5' end of the sense strand, making it highly fluorescent when excited by the appropriate wavelength of light. Silencer® Cy™3 Labeled GAPDH siRNA is suitable for monitoring siRNA uptake by chemical transfection or electroporation. Cy™3 labeling is recommended over FAM™ labeling when using electroporation, because of its brighter fluorescence signal visible over a broader pH range. Electroporation produces a more diffuse siRNA distribution pattern, resulting in a less intense fluorescence signal than with chemical transfection.

Accessory Products:
Silencer® Cy™3 Labeled GAPDH siRNA (human) (SKU #AM4623) is also available as Silencer® FAM™ Labeled GAPDH siRNA for human (SKU #AM4622) and for human, mouse, and rat (SKU #AM4650). Silencer® control siRNAs are unmodified 21-mers; they are designed to be used with Silencer® siRNAs, BLOCK-iT™ siRNAs, and other unmodified 21mer siRNAs. If you are using other siRNA products, such as Ambion® Silencer® Select siRNAs or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.

Silencer™ GAPDH siRNA (human) (Invitrogen™)

Ambion® Silencer® GAPDH Positive Control siRNA (human) is ideal for developing and optimizing siRNA experiments. The control is validated for use in human cell lines. 40 nmol is provided.
• Validated siRNA controls for optimizing siRNA experiments
• Functionally tested in several common cell lines
• HPLC purified, duplexed, and ready to use Silencer® control siRNAs are unmodified 21-mers; they are designed to be used with Silencer® siRNAs, BLOCK-iT™ siRNAs, and other unmodified 21mer siRNAs. If you are using other siRNA products, such as Ambion® Silencer® Select siRNAs or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.

Silencer™ FAM-labeled GAPDH siRNA (human, mouse, rat) (Invitrogen™)

Ambion® fluorescently labeled control siRNA for the easy monitoring of siRNA uptake by fluorescence microscopy along with siRNA-induced knockdown. Purified, annealed, and ready to use, the 5 nmol aliquot is supplied in a stable, dried format.

• Fluorescently labeled siRNAs simplify the monitoring of siRNA delivery
• Ideal for correlating siRNA uptake with mRNA knockdown
• Functionally tested in several common cell lines
• HPLC purified, duplexed, and ready to use

Visualize siRNA Uptake with Labeled siRNAs
Fluorescent labeling of siRNAs allows direct observation of their cellular uptake, distribution, and localization. Fluorescently labeled siRNAs are commonly used to monitor transfection efficiency during optimization of transfection conditions. In general, siRNAs are rapidly taken up by and distributed throughout cells in as little as 4 hours.

Correlate siRNA Uptake with Gene Silencing
Studies show that the silencing activity of Silencer® FAM™ Labeled GAPDH siRNA is not affected by the fluorescent label. Therefore, these siRNAs are ideal for examining both siRNA uptake and siRNA-induced knockdown, and for correlating gene knockdown with transfection efficiency; this is important to know because different transfection reagents interact with siRNAs in different ways (i.e., some reagents may sequester the siRNA, resulting in poor gene knockdown). The Silencer® FAM™ Labeled GAPDH siRNA sequence provides an easy way to monitor siRNA uptake by chemical transfection. The sequence is identical to that of Ambion Silencer® GAPDH siRNA (SKU #AM4605), but with the fluorescein derivative FAM (5'-carboxyfluorescein; excitation max. = 494 nm, emission max. = 520 nm) on the 5' end of the sense strand, making it highly fluorescent when excited by the appropriate wavelength of light.

Accessory Products:
For monitoring siRNA delivery by electroporation, Silencer® Cy™3 Labeled GAPDH siRNA (human) (SKU #AM4623) or Silencer® Cy™3 Labeled GAPDH siRNA for human, mouse and rat (SKU #AM4649) is recommended. Cy™3 has a brighter fluorescence signal than FAM™, visible over a broader pH range. Electroporation produces a more diffuse siRNA distribution pattern resulting in a less intense fluorescence signal than with chemical transfection. Silencer® control siRNAs are unmodified 21-mers; they are designed to be used with Silencer® siRNAs, BLOCK-iT™ siRNAs, and other unmodified 21mer siRNAs. If you are using other siRNA products, such as Ambion® Silencer® Select siRNAs or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.

Anti-miR™ hsa-let-7c miRNA Inhibitor Positive Control (Invitrogen™)

Ambion® Anti-miR™ miRNA Inhibitors are chemically modified, single-stranded nucleic acids designed to specifically bind to and inhibit endogenous microRNA (miRNA) molecules. These ready-to-use inhibitors can be introduced into cells using transfection or electroporation parameters similar to those used for siRNAs. Anti-miR™ let-7c miRNA Inhibitor Positive Control provides a convenient, validated positive control for experiments using Anti-miR miRNA Inhibitors. Endogenous let-7 miRNA negatively regulates HMGA2, a ubiquitously expressed, nonhistone chromatin protein that modulates gene expression through changes in chromatin architecture. When transfected into human and mouse cells, Anti-miR hsa-let-7c miRNA Inhibitor blocks endogenous let-7c miRNA, resulting in increased levels of HMGA2 mRNA.

Accessory Products:
Also available are Anti-miR™ miRNA Inhibitors (SKU #AM17000 and #AM17001). To select your miRNA sequence and order, please visit the GeneAssist™ miRNA Workflow Builder. Anti-miR™ miRNA Inhibitor Negative Control #1 (SKU #AM17010) is a random sequence that has been validated to produce no identifiable effects on known miRNA function. Cy™3 and FAM™ dye-labeled Anti-miR Negative Controls (SKU #AM17011 and #AM17012, respectively) are also available. The Pre-miR™ miRNA Starter Kit (SKU #AM1540) can be used to optimize transfection of Pre-miR™ miRNA Precursors.

Silencer™ Firefly Luciferase (GL2 + GL3) siRNA (Invitrogen™)

Ambion® Silencer® Firefly Luciferase (GL2 + GL3) Positive Control siRNA is ideal for developing and optimizing siRNA experiments. The control is validated for use in human cell lines and optimized for mouse and rat. 5 nmol is provided, along with an additional tube of 2 nmol negative control siRNA.
• Validated siRNA controls for optimizing siRNA experiments
• Gene-specific control siRNAs provided with scrambled, negative controls
• Functionally tested in several common cell lines
• HPLC purified, duplexed, and ready to use Silencer® control siRNAs are unmodified 21-mers; they are designed to be used with Silencer® siRNAs, BLOCK-iT™ siRNAs, and other unmodified 21mer siRNAs. If you are using other siRNA products, such as Ambion® Silencer® Select siRNAs or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.

BLOCK-iT™ Fluorescent Oligo, for electroporation (Invitrogen™)

BLOCK-iT™ Fluorescent Oligo provides:

• A strong, easily detectable FITC signal indicating transfection efficiency
• Chemical modifications for a clearer, more persistent cellular signal than labeled siRNA
• Proven correlation of transfection efficiency with Stealth RNAi™ siRNA and traditional siRNA molecules

This makes the BLOCK-iT™ Fluorescent Oligo an ideal indicator of transfection efficiency for RNAi experiments. BLOCK-iT™ Fluorescent Oligo is available in two configurations: one designed for lipid-mediated transfection (2 x 125 µL) at 20 µM and one designed for electro-poration (75 µl) at 1 mM.

BLOCK-iT™ Fluorescent Oligo, for lipid transfection

BLOCK-iT™ Fluorescent Oligo provides:

• Strong, easily detectable FITC signal indicating transfection efficiency
Chemical modifications for a clearer, more persistent cellular signal than labeled siRNA
Proven correlation of transfection efficiency with Stealth RNAi™ siRNA and traditional siRNA molecules

This makes the BLOCK-iT™ Fluorescent Oligo an ideal indicator of transfection efficiency for RNAi experiments. BLOCK-iT™ Fluorescent Oligo is available in two configurations: one designed for lipid-mediated transfection (2 x 125 µL) at 20 µM and one designed for electroporation (75 µl) at 1 mM.

Ambion™ In Vivo Factor VII Positive Control siRNA (Invitrogen™)

Ambion® In Vivo siRNA Controls
• Validated siRNA controls for optimizing siRNA experiments targeting coding and noncoding transcripts
• Positive Control siRNAs functionally tested in several common cell lines
• Negative Controls functionally proven to have minimal effects on cell proliferation and viability
• Include Silencer® Select modifications for enhanced specificity or Ambion® In Vivo modifications for increased stability
• For use in mouse cells

What are Ambion® In Vivo siRNAs?
Ambion® In Vivo siRNAs are designed using the proven Silencer® Select algorithm and incorporate chemical modifications for superior serum stability with in vivo delivery. The added serum stability does not compromise the performance of the siRNAs. Ambion® In Vivo siRNAs have been shown to be non-toxic in vivo (mouse) and non-immunogenic (cell-based assays). In cell-based assays, Ambion® In Vivo siRNAs exhibit equivalent or better potency than Silencer® Select siRNAs. The result is better confidence in your in vivo RNAi experiments, better knockdown when paired with an efficient delivery solution, and the assurance of limited non-specific effects.

Factor VII (FVII) Positive Control siRNA
Ambion® In Vivo Factor VII siRNA, In Vivo Ready, provides a positive control for experiments involving Ambion® In Vivo siRNA delivery to mice. Factor VII (FVII⁄F7; also known as proconvertin) is a vitamin K-dependent serine protease that functions as a central protein in the coagulation cascade. FVII is synthesized in the liver and secreted to the plasma where it circulates in an inactive form. After delivery of FVII-targeting siRNA to the liver, knockdown can be measured by quantifying FVII protein levels in blood by robust, commercially available chromogenic assays. Moreover, blood samples can be collected from the same animal at multiple time points post-siRNA injection. These features enable much more rapid and efficient knockdown measurements for FVII than for gene targets that require quantitation of mRNA levels in liver tissue, making FVII an ideal control for in vivo siRNA delivery.

Quality Control
Ambion® synthesizes and purifies each Ambion® In Vivo siRNA in state-of-the-art facilities to meet the highest quality standards. As part of our rigorous quality control procedures, each RNA oligonucleotide is analyzed by MALDI-TOF mass spectrometry, and analytical HPLC is used to monitor purity. To provide the utmost in quality, we also assess each annealed siRNA by gel electrophoresis to confirm that the strands anneal properly. The result is premium-quality siRNA that is purified and ready to use.

In Vivo Ready Controls
Our "In Vivo Ready" Control siRNAs are subjected to that extra level of purification and testing required for the introduction of siRNAs into animals. After HPLC purification and annealing, each siRNA is further purified utilizing a process that removes excess salt via a semi-permeable membrane. The result is highly pure siRNA with minimal salt content, suitable for in vivo applications. In vivo siRNAs are then sterile filtered, and tested for the presence of endotoxin. At concentrations of 50 µM in presence of deionized water, in vivo Ready siRNAs contain <5.0 mM Na+, <0.06 mM K+, and <0.02 mM Mg2+.

Silencer™ Select GAPDH Positive Control siRNA (Invitrogen™)

Ambion® Silencer® SelectGAPDH Positive Control siRNA is extensively validated and an ideal control for many aspects of an siRNA experiment. 5 nmol is provided.

• Premium-quality siRNA, highly purified and ready to use
• Functionally tested in several common cell lines
• Include Silencer® Select modifications for enhanced specificity
• For use in human, mouse, and rat cells

What are Silencer® Select siRNAs?
Silencer® Select siRNAs incorporate the latest improvements in siRNA design, off-target effect prediction algorithms, and chemical modifications, to yield siRNAs with unrivalled efficacy, potency, and specificity. The result is fewer failed experiments due to poor silencing, and cleaner, more consistent phenotypic data.

Silencer® Select GAPDH Positive Control siRNA:
The Silencer® SelectGAPDH positive control is extensively validated and an ideal "test" siRNA for those just beginning siRNA experiments, because it is validated to work in multiple cell lines. Because it targets GAPDH mRNA (a common internal control), many assays are available to measure its effects, including real-time RT-PCR as well as the Ambion® KDalert™ GAPDH Assay Kit.

Quality Control:
Silencer® Select siRNAs are manufactured in a state-of-the-art facility under the highest quality standards. Rigorous quality control procedures include MALDI-TOF mass spectrometry analysis and analytical HPLC to monitor purity. Each siRNA is also assessed by gel electrophoresis to confirm that the strands anneal properly.

Accessory Product: siPORT™ NeoFX™ Transfection Agent (SKU #AM4510 and #AM4511)
siPORT™ NeoFX™ Transfection Agent is a versatile, lipid-based transfection agent for the efficient transfection of siRNA into cultured cells. The protocol can be adapted to a wide range of cells and experimental designs, including high-throughput applications. Silencer® Select siRNA controls have specific chemical modifications; they are designed to be used with Silencer® Select siRNAs. If you are using other siRNA products, such as BLOCK-iT™ siRNAs, Ambion® Silencer® siRNAs, or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.

mirVana™ miRNA Mimic, miR-1 Positive Control (Invitrogen™)

miRNA mimics are small, chemically modified double-stranded RNA molecules designed to specifically bind to and mimic endogenous miRNA molecules and enable miRNA functional analysis by up-regulation of miRNA activity.

We have now released the second generation of miRNA mimics, mirVana™ miRNA Mimics, which:
Exhibit maximum and consistent effect in vitro at low concentration
• Are non toxic
• Offer superior specificity due to unique Star strand modification
• Target the most updated Sanger content
• Can be used in vitro and in vivo, offering you consistency throughout your entire research project


Positive and negative controls are also available for use along with mirVana™ miRNA Mimics in miRNA up-regulation experiments.

mirVana™ miRNA Mimic miR-1 Positive Control
The mirVana™ miRNA Mimic miR-1 Positive Control is designed to mimic mature miR-1 miRNA after delivery to mammalian cells. miR-1 is associated with down-regulation of many genes. In particular, miR-1-mediated down-regulation of Protein Tyrosine Kinase 9 (PTK9) has been shown to occur at the mRNA level. miR-1 Positive Control is intended for use as a positive control for transfection experiments using mirVana™ miRNA Mimics. Monitor activity of miR-1 Positive Control through its gene silencing of PTK9, using real-time reverse transcription-PCR to detect PTK9 mRNA.

First Generation Mimic Controls
Our first-generation miRNA mimics (and controls), Ambion® Pre-miR™ miRNA Precursors, have lower specificity and potency, plus a lower strand specificity compared to the new mirVana™ miRNA Mimics. These first-generation mimics are recommended for completing ongoing in vitro miRNA studies. For new studies or in vivo studies, we highly recommend our new mirVana™ miRNA Mimics and their corresponding controls.

Pre-miR™ hsa-miR-1 miRNA Precursor Postive Control (Invitrogen™)

The Pre-miR™ hsa-miR-1 miRNA Precursor is intended for use as a positive control in experiments utilizing Pre-miR miRNA Precursors. This precursor was chosen as a positive control because, upon delivery into cells, it effectively down regulates the expression of twinfilin-1, also known as PTK9, at the mRNA level (60-95% reduction. Effective delivery and activity of the Pre-miR hsa-miR-1 miRNA Precursor can be detected by real-time PCR using a TaqMan® Gene Expression Assay to PTK9 (Assay IDs: Hs00702289_s1 [human], Mm01598980_g1 [mouse]).

About Pre-miR miRNA Precursors

Pre-miR™ miRNA Precursor Molecules are small, chemically modified double-stranded RNA molecules designed to mimic endogenous mature miRNAs. These ready-to-use miRNA mimics, which are similar to, but not identical to siRNAs, can be introduced into cells using transfection or electroporation parameters similar to those used for siRNAs. They enable detailed study of miRNA biological effects via gain-of-function experiments (Figure 1). Positive and negative control Pre-miR miRNA Precursors (listed above) or the Pre-miR™ Precursor Starter Kit can be used to optimize transfection of Pre-miR miRNA Precursors.

Pre-miR miRNA Precursor Molecules have been carefully designed and modified to ensure that the correct strand, representing the desired mature miRNA, is taken up into the RNA-induced silencing-like complex responsible for miRNA activity (Figure 2). In contrast to miRNA expression vectors, these synthetic molecules can be used in dose response studies due to their introduction directly into the cell by transfection or electroporation. Thanks to their small size, they are easier to transfect than vectors, and can be delivered using conditions identical to those used for siRNAs.

Stealth RNAi™ siRNA GAPDH Positive Control (human) (Invitrogen™)

Stealth RNAi™ siRNA Positive Housekeeping Control Duplexes (human) are ideal for use in RNA interference (RNAi) experiments as a control for assessing knockdown and optimizing RNAi experiments. These controls are: –Designed to efficiently knock-down the intended target –Have been bench tested and are supplied in a ready-to-use format

Stealth RNAi™ siRNA Luciferase Reporter Control (Invitrogen™)

Stealth RNAi™ siRNA Reporter Controls are ideal for use in RNA interference (RNAi) experiments to help you optimize your transfection conditions in any vertebrate cell line. These controls are: –Designed to efficiently knock-down its intended target –Not homologous to anything in vertebrate transcriptome

Silencer™ GAPDH Positive Control siRNA, in vivo ready (Invitrogen™)

Ambion® Silencer® GAPDH Positive Control siRNA, In Vivo Ready is ideal for developing and optimizing siRNA experiments. The control is validated for use in human cell lines and optimized for mouse and rat. It is highly purified as required for animal use. 250 nmol is provided.
• Validated siRNA controls for optimizing siRNA experiments
• Gene-specific control siRNAs provided with scrambled, negative controls
• Functionally tested in several common cell lines
• HPLC purified, duplexed, and ready to use

Quality Control:Silencer® siRNAs are manufactured in a state-of-the-art facility under the highest quality standards. After HPLC purification and annealing, each siRNA is further purified utilizing a process that removes excess salt via a semipermeable membrane. The result is highly pure siRNA with minimal salt content, suitable for in vivo applications. In vivo siRNAs are then sterile filtered and tested for the presence of endotoxin. At concentrations of 50 µM in deionized water, In Vivo Ready siRNAs contain <0.6 mM Na+, <2.0 mM K+, and <0.1 mM Mg2+. Silencer® control siRNAs are unmodified 21-mers; they are designed to be used with Silencer® siRNAs, BLOCK-iT™ siRNAs, and other unmodified 21mer siRNAs. If you are using other siRNA products, such as Ambion® Silencer® Select siRNAs or STEALTH RNAi™ siRNAs, we recommend that you use control siRNAs designed for use with those siRNAs for more reliable experimental results.