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       DENARASE®   |  DENARASE® High Salt |  DENARASE® ELISA Kit |  DENARASE® Reference Paper

DENARASE® High Salt

DENARASE® High Salt is a specialized variant of the traditional DENARASE® endonuclease, modified through selective amino acid substitutions to enhance its tolerance to high salt conditions. This engineered enzyme demonstrates superior resilience to increased salt levels and a wider pH range, offering augmented adaptability for bioprocessing tasks.

Specifically tailored from the wild-type Serratia marcescens endonuclease—a key tool in DNA removal for bioprocessing—DENARASE® High Salt retains the original enzyme's specificity for nucleic acids while exhibiting heightened performance across an extended range of salt concentrations and pH values, thereby providing increased operational flexibility in bioprocessing environments.

Remarkably, despite its modifications, DENARASE® High Salt maintains a high degree of similarity to the wild-type enzyme, allowing for its detection using standard Serratia marcescens endonuclease ELISA Kits, such as the DENARASE® ELISA Kit. The production of DENARASE® High Salt adheres to the proven, proprietary manufacturing processes of DENARASE®, utilizing a gram-positive Bacillus sp. strain. This production is executed under the ISO 9001 standard, eschewing the use of antibiotics, animal-derived raw materials, or materials with TSE/BSE risks, ensuring a high-quality and safe product for diverse bioprocessing applications.

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Optimal Efficiency Across All Salt Levels!


DENARASE® High Salt surpasses other salt-active nucleases (SAN) in performance, particularly at the elevated salt concentrations relevant to industrial processes.
DENARASE®
  • Peak performance at low & physiological salt concentrations

  • Use of DENARASE® below 200 mM salt


DENARASE® High Salt
  • Designed to retain activity at elevated salt concentrations

  • Highest activity over the broadest spectrum of salt concentrations
  • Use of DENARASE® High Salt above 200 mM

Salt & Magnesium Concentration

DENARASE® High Salt has been designed to enable DNA clearance activity at higher, process relevant, salt conditions (see Fig. 1). The engineered enzyme exhibits activity from 0-500 mM monovalent cation concentrations.

Fig. 1: Effect of NaCl

Fig. 2: Effect of Magnesium

pH & Temperature

Fig. 3: Effect of pH value in different buffer systems

Fig. 4: Effect of Temperature

Product Specification

In order to ensure a constant and high-quality level for DENARASE® High Salt, each batch must fulfill the in-house acceptance criteria for the parameters listed below.

 
Criteria Method Specification
Appearance Visual Clear, transparent solution
Activity Photometric1 >250 U/µL
Purity Protein purity determined by
SDS-PAGE and silver staining
≥ 99%
Specific Activity Activity per protein content
determined photometrically
at 280 nm with a molar extinction
coefficient of 44,600 L x mol-1 x cm-1
>5 x 105 U/mg
Endotoxin Level  LAL-Test acc. to Ph. Eur. 2.6.14, Method C                 <0.25 EU/kU
Total Microbial Count            TAMC/TYMC acc. to Ph. Eur. 2.6.12 Aerobic bacteria: < 5 cfu/200 µL
Yeast/moulds: < 5 cfu/200 µL

1Unit-definition: One unit (U) will digest salmon sperm DNA to acid-soluble oligonucleotides equivalent to a ΔA260nm of 1.0 in 30 min at pH 8.0 at 37 °C.

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