CHO Host Cell DNA Residue Detection Kit is used for the quantitative analysis of CHO host cell DNA residuce in intermediate samples, semi-finished and finished products of various biological products.

This kit adopts Taqman fluorescent probe and the polymerase chain reaction (PCR) method, which has fg level minimum detection limit and can specifically and quickly detect the residual CHO cell DNA. The kit needs to be used together with the the Residual DNA Sample Preparation Kit (Cat# 18461ES or 18469).

Features

High anti-interference capability – In complex sample matrices, spike recovery rates are consistently between 70% and 130%.

High sensitivity – Limit of quantification (LLOQ) as low as 10 fg/μL.

Excellent precision – Intra-assay CV <10%; inter-assay (intermediate) CV <15%.

Strong specificity – Specifically detects HEK 293 residual DNA without interference from other genomic DNA.

Robust contamination control – Includes UDG enzyme to digest potential carryover from PCR products and aerosols, preventing non-specific amplification.

Comprehensive validation – Fully validated according to ICH Q2 (R2) guidelines; complete validation reports available.

Regulatory compliance – Verified according to EP 2.6.7, JP G3, and USP <63> pharmacopeia standards.

Quality assurance – All enzymes are self-developed and industrialized, ensuring stable supply and consistent kit performance.

Components

Specifications

Storage

This product should be stored at -25~-15℃ for 2 years.

Both 41331-A and 41331-B should be stored protected from light.

Figures

1. Good Linearity

Figure 1. Standard curve (left) and amplification curve plot (right) for HEK293 DNA (3G).

The linear range of the HEK293 Host Cell Residual DNA Detection Kit (3G) is 30 fg/μL to 300 pg/μL, with an R² value of 1.0 and an amplification efficiency of 100.45%. The coefficient of variation (CV) for detection values across concentrations is <15%.

2. Sensitivity: Limit of quantification (LOQ) - 0.3 fg/μL

Figure 2. qPCR detection of HEK293 DNA at 10 fg/μL.

HEK293 DNA (3G) at the lowest standard curve concentration (3 fg/μL) and below was tested with 10 replicates per concentration. Results showed that at concentrations ≥10 fg/μL, the CV was <20%, indicating that the limit of quantification (LOQ) of the HEK293 Host Cell DNA Residual Detection Kit (3G) is 10 fg/μL.

3. High Recovery rate: 50%–150%

Table 1. Recovery of HEK293 DNA in Blank Samples

Spike recovery rates for all concentrations tested were between 70% and 130%, with coefficients of variation (CV) below 20%, demonstrating consistent performance of the assay across a wide dynamic range.

Table 2. HEK293 DNA Recovery in Various Sample Matrices

HEK293 DNA (3 pg/μL) was spiked into five different background matrices (high protein, high nucleic acid, high salt, high pH, low pH) and extracted using the same procedure. Recovery rates ranged from 70% to 130%, with CVs below 20% for all matrices, demonstrating robust performance across diverse sample backgrounds.

Documents

Safety Data Sheet

41331_MSDS_HB250924_EN.PDF

Manuals

41331_Manual_Ver.EN20240517.pdf