Shop All Affinity Ligand Leakage Quantitation Kits

CaptureSelect™ FcXL Ligand Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ FcXL Ligand Leakage ELISA detects affinity ligand contamination of antibodies or antibody fragments purified using CaptureSelect™ FcXL Affinity Matrix. The ligand, a 13 kD recombinant protein, is coupled by multipoint attachment through stable amide bonds to give high chemical stability and low leakage. Even when covalently attached, small amounts of the affinity ligand can leach off of the chromatography support and co-elute with the protein. This sensitive ELISA detects affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation even in the presence of the protein of interest. The CaptureSelect™ FcXL Ligand Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

resDNASEQ™ Human Residual DNA Quantitation Kit with PrepSEQ™ Residual DNA Sample Preparation Kit (Applied Biosystems™)

The resDNASEQ Human Residual DNA Quantitation Kit is a quantitative PCR (qPCR)-based system for the detection of host cell DNA from human cell lines used as expression systems for recombinant proteins. Reliable and rapid, the resDNASEQ system enables sensitive (as low as 1.5 pg DNA/mL test sample) and specific quantitation of human cell DNA*. This performance helps ensure a high degree of confidence in quantitation data obtained from a broad range of sample types—from in-process samples to final product—whether the sample contains high molecular weight or sheared DNA.

This kit is bundled together with sample preparation reagents in the form of a PrepSEQ Residual DNA Sample Preparation Kit, which is optimized for highly efficient residual DNA recovery from complex mixtures of proteins, buffers, and salts. For the quantitation kit alone without the sample preparation kit, please see resDNASEQ Human Residual DNA Quantitation Kit.

• Highly sensitive quantitation using proven TaqMan real-time qPCR technology
• Consistent performance across the expected range of DNA fragment sizes
• Includes master mix, TaqMan primer/probe mix, and human genomic DNA standard

The resDNASEQ Human Residual DNA Quantitation Kit provides highly sensitive detection of human DNA, allowing you to use small sample volumes to generate accurate results. The broad linear range of TaqMan real-time qPCR technology allows you to test samples with variable levels of human DNA in the same assay, such as in-process samples with higher amounts of DNA or bulk drug substance with very low amounts.

Easy to use
With the resDNASEQ Human Residual DNA Quantitation Kit you perform qPCR analysis to compare the amount of human DNA in your test samples to a standard curve generated with known amounts of purified human genomic DNA standard. The resDNASEQ kit includes almost everything you need to carry out these steps, from master mix to TaqMan primer/probe mix to human genomic DNA standard, as well as step-by-step instructions.

Consistent performance
For accurate quantitation of residual human DNA, assay results must be unaffected by the size of the DNA molecules present in the test sample. With the resDNASEQ system you get consistent assay performance across a range of DNA fragment sizes.

* Due to the high degree of similarity between genomes, DNA from closely-related primate species such as monkey (Vero), chimpanzee, and orangutan are expected be detected by the resDNASEQ Human Quantitation Kit.

CaptureSelect™ KappaXL Ligand Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ KappaXL Ligand Leakage ELISA detects affinity ligand contamination of antibodies or antibody fragments purified using CaptureSelect™ KappaXL Affinity Matrix. The ligand, a 13 kD recombinant protein, is coupled by multipoint attachment through stable amide bonds to give high chemical stability and low leakage. Even when covalently attached, small amounts of the affinity ligand can leach off of the chromatography support and co-elute with the protein. This sensitive ELISA detects affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation even in the presence of the protein of interest. The CaptureSelect™ KappaXL Ligand Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

resDNASEQ™ Quantitative E. coli DNA Kit (Applied Biosystems™)

This quantitative PCR (qPCR)-based kit—part of the resDNASEQ® E. coliResidual DNA Quantitation System—enables highly sensitive quantitation of host cell DNA from E. coliexpression systems, typically in less than 4 hours.

The kit is part of an integrated system that includes sample preparation, TaqMan® Assay and master mix, standard DNA, instrument, and software. The system overcomes the limitations of traditional methods by combining high-recovery PrepSEQ® sample preparation and TaqMan® Assay-based quantitation of residual DNA.

Highly sensitive quantitation using proven TaqMan® real-time qPCR technology (Figure 1)
• Manual and automated sample preparation, optimized for quantitative recovery from complex sample matrices (Table 1)
• Consistent performance across the expected range of DNA fragment sizes (Figure 2)
• Integrated system from sample to results with sample preparation, master mix, TaqMan® primer/probe mix, and genomic DNA standard


Rapid, Sensitive Detection of E.Coli DNA
The resDNASEQ® E. coli Residual DNA Quantitation System is a quantitative PCR (qPCR)-based system for the detection of host cell DNA fromE. coli, an expression system commonly used for the production of recombinant proteins. Reliable and rapid, the system enables sensitive (LOQ = 15 pg DNA/ml test sample, Figure 1) and specific (Figures 2 and 3) quantitation ofE. coli DNA, typically in less than 4 hours. This performance helps ensure a high degree of confidence in quantitation data obtained from a broad range of sample types—from in-process samples to bulk drug substances—whether a sample contains high molecular weight or sheared DNA (Figure 3).

Table 1. DNA recovery using manual PrepSEQ® sample preparation protocol.
Assay performance data using 10 pg E. coli genomic DNA spike per sample, 3 analysts, and 9 test samples.

50 mg/ml protein sample
Mean Recovery Mean %CV
E. coli 83%5.04%


For Research Use Only. Not for use in diagnostics procedures.

CaptureSelect™ AVB Sepharose HP Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ AVB Sepharose HP Leakage ELISA detects AVB Sepharose HP affinity ligand contamination of adeno-associated viruses (AAV) purified using AVB Sepharose HP affinity resin (GE Healthcare). Even when covalently attached, small amounts of the AVB Sepharose HP affinity ligand can leach off of the chromatography support and co-elute with the virus particles. This ELISA provides sensitivity to detect AVB Sepharose HP affinity ligand contamination of less than 0.5 ng/mL. This assay is designed to minimize interference and to provide accurate quantitation in the presence of adeno-associated viruses. The CaptureSelect™ AVB Sepharose HP Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

CaptureSelect™ AAV9 Ligand Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ AAV9 Ligand Leakage ELISA detects affinity ligand contamination of antibodies or antibody fragments purified using POROS™ CaptureSelect™ AAV9 Affinity Resin. The ligand, a 13 kD recombinant protein, is coupled by multipoint attachment through stable amide bonds to give high chemical stability and low leakage. Even when covalently attached, small amounts of the affinity ligand can leach off of the chromatography support and co-elute with the protein. This sensitive ELISA detects affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation even in the presence of the protein of interest. The CaptureSelect™ AAV9 Ligand Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

resDNASEQ™ Quantitative NS0 DNA Kit (Applied Biosystems™)

The resDNASEQ® Quantitative NS0 DNA Kit is a quantitative PCR (qPCR)-based system for the detection of host cell DNA from NS0 (murine myeloma) cells, an expression system commonly used for the production of vaccines. Reliable and rapid, the resDNASEQ® system enables sensitive (as low as 1.5 pg DNA/mL test sample) and specific quantitation of NS0 cell DNA. This performance helps ensure a high degree of confidence in quantitation data obtained from a broad range of sample types—from in-process samples to final product—whether the sample contains high molecular weight or sheared DNA.

This kit does not include sample preparation reagents—for this, please see resDNASEQ® NS0 Residual DNA Quantitation System with PrepSEQ® Residual DNA Sample Preparation Kit.

• Highly sensitive quantitation using proven TaqMan® real-time qPCR technology
• Consistent performance across the expected range of DNA fragment sizes
• Includes master mix, TaqMan® primer/probe mix, and NS0 genomic DNA standard
• Manual and automated sample preparation, optimized for quantitative recovery from complex sample matrices

The resDNASEQ® Quantitative NS0 DNA Kit is designed to provide highly sensitive detection of NS0 DNA, allowing you to use small sample volumes to generate accurate results. The broad linear range of TaqMan® real-time qPCR technology allows you to test samples with variable levels of NS0 DNA in the same assay, such as in-process samples with higher amounts of DNA or bulk drug substance with very low amounts.

Easy to use, results in under 4 hours
The easy workflow of the resDNASEQ® Quantitative NS0 DNA Kit consists of sample preparation, assay setup, and instrument run and data analysis—all of which you can perform in under 4 hours. Start by extracting DNA from your in-process purification and drug substance samples. Then perform qPCR analysis to compare the amount of NS0 DNA in your test samples to a standard curve generated with known amounts of purified NS0 genomic DNA standard. The resDNASEQ® system includes almost everything you need to carry out these steps, from sample preparation kit to master mix to TaqMan® primer/probe mix to NS0 genomic DNA standard, as well as step-by-step instructions.

Specific to NS0 DNA, no cross-reactivity with unrelated DNA
The target of the assay is highly specific—it only detects a NS0-specific region of a multicopy genetic element. We selected this region using extensive bioinformatic analysis of multiple related and unrelated species.

Consistent performance even with fragmented DNA
For accurate quantitation of residual NS0 DNA, assay results must be unaffected by the size of the DNA molecules present in the test sample. With the resDNASEQ® system you get consistent assay performance across a range of DNA fragment sizes.

CaptureSelect™ IgM Ligand Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ IgM Ligand Leakage ELISA detects affinity ligand contamination of IgM purified using CaptureSelect™ IgM Affinity Matrix. The ligand, a 14 kD recombinant protein, is coupled by multipoint attachment through stable amide bonds to give high chemical stability and low leakage. Even when covalently attached, small amounts of the affinity ligand can leach off of the chromatography support and co-elute with the protein. This sensitive ELISA detects affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation even in the presence of the protein of interest. The CaptureSelect™ IgM Ligand Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

CaptureSelect™ tPA Ligand Leakage ELISA (Thermo Scientific™)

The CaptureSelect tPA Ligand Leakage ELISA detects affinity ligand contamination of antibodies or antibody fragments purified using CaptureSelect tPA Affinity Matrix. The ligand, a 13 kD recombinant protein, is covalently coupled to give high chemical stability and low leakage. Even when covalently attached, small amounts of the affinity ligand can leach off of the chromatography support and co-elute with the protein. This sensitive ELISA detects affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation even in the presence of the protein of interest. The CaptureSelect tPA Ligand Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

CaptureSelect™ IX Select Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ IXSelect Leakage ELISA detects IXSelect affinity ligand contamination of human Factor IX, purified using IXSelect affinity resin (GE Healthcare). Even when covalently attached, small amounts of the IXSelect affinity ligand can leach off of the chromatography support and co-elute with the purified product. This ELISA provides the sensitivity to detect IXSelect affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation in the presence of Factor IX and other proteins. The CaptureSelect™ IXSelect Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

CaptureSelect™ Ig Select Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ IgSelect Leakage ELISA detects IgSelect affinity ligand contamination of human IgG purified using IgSelect affinity resin (GE Healthcare). Even when covalently attached, small amounts of the IgSelect affinity ligand can leach off of the chromatography support and co-elute with the antibody. This ELISA provides sensitivity to detect IgSelect affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation in the presence of human IgG. The CaptureSelect™ IgSelect Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

CaptureSelect™ VII Select Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ VIISelect Leakage ELISA detects VIISelect affinity ligand contamination of human recombinant Factor VII purified using VIISelect affinity resin (GE Healthcare). Even when covalently attached, small amounts of the VIISelect affinity ligand can leach off of the chromatography support and co-elute with the purified product. This ELISA provides sensitivity to detect VIISelect affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation in the presence of Factor VII and other proteins. The CaptureSelect™ VIISelect Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

resDNASEQ™ Quantitative Pichia pastoris DNA Kit and PrepSEQ™ Residual DNA Sample Preparation Kit

The resDNASEQ® Quantitative Pichia pastoris DNA Kit is a quantitative PCR (qPCR)-based system for the detection of host cell DNA from Pichia pastoris cells, an expression system commonly used for the production of recombinant proteins. Reliable and rapid, the resDNASEQ® kit enables sensitive (as low as 15 pg DNA/mL test sample) and specific quantitation of Pichia pastoris cell DNA. This performance helps ensure a high degree of confidence in quantitation data obtained from a broad range of sample types—from in-process samples to final product—whether the sample contains high molecular weight or sheared DNA.

This kit is bundled together with sample preparation reagents in the form of a PrepSEQ® Residual DNA Sample Preparation Kit, which is optimized for highly efficient residual DNA recovery from complex mixtures of proteins, buffers, and salts. For the quantitation kit alone without the sample preparation kit, please see resDNASEQ® Quantitative Pichia pastoris DNA Kit.

• Highly sensitive quantitation using proven TaqMan® real-time qPCR technology
• Consistent performance across the expected range of DNA fragment sizes
• Includes master mix, TaqMan® primer/probe mix, and Pichia pastoris genomic DNA standard

The resDNASEQ® Quantitative Pichia pastoris DNA Kit is designed to provide highly sensitive detection of Pichia pastoris DNA, allowing you to use small sample volumes to generate accurate results. The broad linear range of TaqMan® real-time qPCR technology allows you to test samples with variable levels of Pichia pastoris DNA in the same assay, such as in-process samples with higher amounts of DNA or bulk drug substance with very low amounts.

Easy to use
With the resDNASEQ® Quantitative Pichia pastoris DNA Kit you can perform qPCR analysis to compare the amount of Pichia pastoris DNA in your test samples to a standard curve generated with known amounts of purified Pichia pastoris genomic DNA standard. The resDNASEQ® kit includes almost everything you need to carry out these steps, from TaqMan® primer/probe mix to Pichia pastoris genomic DNA standard, as well as step-by-step instructions.

Specific to Pichia pastoris DNA, no cross-reactivity with unrelated DNA
The target of the assay is highly specific—it only detects a Pichia pastoris-specific region of a multicopy genetic element. We selected this region using extensive bioinformatic analysis of multiple related and unrelated species.

Consistent performance even with fragmented DNA
For accurate quantitation of residual Pichia pastoris DNA, assay results must be unaffected by the size of the DNA molecules present in the test sample. With the resDNASEQ® system you get consistent assay performance across a range of DNA fragment sizes.

CaptureSelect™ Kappa Select Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ KappaSelect Leakage ELISA detects KappaSelect affinity ligand contamination of human Fab fragments or Ig’s with a kappa light chain that have been purified using KappaSelect affinity resin (GE Healthcare). Even when covalently attached, small amounts of the KappaSelect affinity ligand can leach off of the chromatography support and co-elute with the antibody. This ELISA provides sensitivity to detect KappaSelect affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation in the presence of human immunoglobulins or fab fragments. The CaptureSelect™ KappaSelect Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.

CaptureSelect™ FSH Ligand Leakage ELISA Kit (Thermo Scientific™)

The CaptureSelect™ FSH Ligand Leakage ELISA detects affinity ligand contamination of FSH purified using CaptureSelect™ FSH Affinity Matrix. The ligand, a 14 kD recombinant protein, is coupled by multipoint attachment through stable amide bonds to give high chemical stability and low leakage. Even when covalently attached, small amounts of the affinity ligand can leach off of the chromatography support and co-elute with the protein. This sensitive ELISA detects affinity ligand contamination of less than 1 ng/mL. The assay is designed to minimize interference and to provide accurate quantitation even in the presence of the protein of interest. The CaptureSelect™ FSH Ligand Leakage ELISA can be used as a tool to aid in optimal purification process development and in routine quality control of in-process streams as well as final product.