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AptaTaq DNA Polymerase LDx,
50 U/μl

from Thermus aquaticus BM, expressed in E. coli, glycerol-free solution

For further processing only.

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Order information
AptaTaq DNA Polymerase LDx,
50 U/μl material number and pack size:
Material Number Pack Size
05447895103 custom fill
Will be supplied as "AptaTaq DNA Polymerase. LDx, Glyc.-free, 50 U/μL". Unit of measure is "kU".
Reversible hot start Taq DNA Polymerase without initial activation step for maximum stability combined with sensitivity and specificity in microbial testing; lyo ready formulation for preparation of dried amplification mixes.
AptaTaq DNA Polymerase LDx is a blend of Taq DNA Polymerase and a specific oligonucleotide (aptamer) with hot start features, optimized for applications detecting the lowest levels of DNA.
  • Minimize risk of contaminating nucleic acids.
    AptaTaq DNA Polymerase LDx is extensively evaluated using ultra sensitive tests for detecting contaminating nucleic acids from bacteria and fungi. Roche has developed a nucleic acid-free workflow with clearly defined, highly consistent manufacturing processes resulting in a product with very low nucleic acid background.
  • Prepare stable amplification mixes in dry format.Use this formulation for producing dried-down amplification mixes stable at room temperature.
  • Enjoy the benefits of the advanced AptaTaq hot start system.
    Refer to AptaTaq DNA Polymerase for additional benefits like speed, easy handling and consistent results.
Select AptaTaq DNA Polymerase LDx to perform microbial testing and other assays where the absence of contaminating bacterial, fungal, and/or human DNA is crucial. AptaTaq DNA LDx Polymerase is ideal for:
  • Fast PCR assays with no extra enzyme activation time and fast cycling protocols
  • Single- and multiplex PCR and qPCR applications that require high specificity, sensitivity, and yield
  • RT-PCR
  • Difficult templates with complex secondary structures or GC-rich sequences
  • Formulation of dried-down amplification reagents
AptaTaq DNA Polymerase LDx is active at temperature above +60 to +65°C and inactive below +55°C. This hot start feature eliminates the risk of nonspecific primer extension. Taq DNA Polymerase is a highly processive 5'-3' DNA Polymerase lacking 3'-5' exonuclease activity. Taq DNA Polymerase is stable during prolonged incubations at elevated temperatures (+95°C). This enzyme exhibits highest activity at a pH of approximately 9 (adjusted at +20°C) and temperatures approximately +75°C. Taq DNA Polymerase accepts dNTP analogs as substrates.
pH optimum: Approximately 9.0 (+20°C)
Temperature optimum for elongation: Approximately +75°C
Half life at +95°C: Approximately 40 minutes
Divalent ion requirement: Mg2+ (standard concentration, 1.5 mmol/L)
dNTP requirement: Approximately 200 μmol/L for each dNTP
Appearance: Clear, colorless solution
Storage buffer: Tris/HCl, 20 mmol/L; KCl, 100 mmol/L; EDTA, 0.1 mmol/L; DTT, 1 mmol/L; Nonidet P40, 0.5% (v/v); Tween 20, 0.5% (v/v); pH approximately 8.0 at +4°C
Volume activity: 55±5 U/μL
Glycerol content: ≤0.1% (v/v)
Aptamer concentration (HPLC): 35.75 μmol/L ±10%
Unspecific endonucleases (λDNA): Not detectable in up to 30 U after 16 hours incubation at +37°C.
Nicking activity (pBR322 DNA): Not detectable in up to 30 U after 16 hours incubation at +37°C.
Exonucleases (3H-DNA): Not detectable in up to 30 U after 4 hours incubation at +65°C.
Tests for the presence of contaminating nucleic acids
(human genomic DNA, β-Globin fragment): Corresponds to specification
(LC UniTool Resolight assay, specific for grampositive and gramnegative bacterial DNA and fungi DNA, <1.0 copy genomic DNA/20 U enzyme): Corresponds to specification
Performance test in qPCR using LightCycler® 480 (≥0.03 ng human genomic DNA, 339 bp tPA fragment): Corresponds to reference
Stability: At -15 to -25°C within specification range for 12 months.