COSMO PCR Hot Start Master Mix

The COSMO PCR Hot Start Master Mix is a ready-to-use solution that can be used for robust amplification up to 5 kb of genetic material from original template DNA. This mix contains all the necessary components required for a successful PCR, the only addition is the DNA template and primers. The reaction mix is already optimised for an efficient PCR and so generates long products at a higher yield whilst minimising contamination risk and the time taken to prepare a reaction. The hot start Taq polymerase ensures that  non-specific amplification does not occur during PCR set-up.


This product contains of the necessary components for PCR with the exception of the template DNA and primers.

This product contains the COSMO Hot Start Taq DNA Polymerase, optimised COSMO Taq RED buffer, MgCl2 and dNTPs.


Efficient– Easily transition to analysis just by adding the product to gel.

Robust– High fidelity amplification with little optimisation required.

Versatile– Modifications can be made to the dNTPs and these dNTPs will be incorporated into the PCR products. Please note that dUTP is not incorporated into the products

High yield and sensitivity– Our RED buffer optimises the performance for even the most complex DNA templates; by amplifying them at high fidelity.

Ready to use– Just add the primers and DNA template to the master mix and then following the protocol; you can produce PCR products with ease.

Research use only.

Use the below tables as a guide on how to use this product

Table 1: Reagents to be added
DNA 10 pg – 1 µg
Forward & Reverse Primers 0.1-1 µM
Master Mix 25 µl
Make up to 50 µl with nuclease-free water
Table 2: Recommended Thermal Profile
Initial Denaturation 95ºC 2 minutes
Thermal Cycles
(25-35 cycles)
95ºC 15 seconds
45-60ºC 20 seconds
72ºC 30-60 seconds
Final Extension 72ºC 1 minute


Package Size Order Information

COSMO PCR Master Mix

100 reactions


500 reactions


1000 reactions


Storage Conditions

Store at -20°C.

Components of kit

COSMO Taq DNA Polymerase– a thermostable DNA polymerase used for the DNA synthesis.

COSMO buffer and ion solutions– Contains the optimal concentrations of (NH4)2SO4 and KCl. In addition to this it contains two tracking dyes for use in gel loading, and a density reagent. Buffered to 9 pH to maximise performance.

MgCl2– Within the RED buffer we have included MgCl2 as the polymerase requires Mg2+ cofactors to function. If the DNA template was extracted with chelating agents like EDTA additional Mg2+ ions are required to maintain the enzyme’s performance. We advise compensating for the chelated Mg2+ by adding 5 μl of 25 mM MgCl2.

dNTPs– Using HPLC analysis we have measured ≥99% purity of the dNTPs in our products to ensure maximum fidelity and speed.

Storage buffer– 20 mM 8.0 pH Tris buffer, 100 mM KCl, 0.1 mM EDTA, 1mM DTT and Glycerol. This solution is designed to minimise enzyme degradation during storage.

If you require any additional information about this product please email us at

Please click here for the PCR Troubleshooting guide.

Please click here for the COSMO PCR MASTER MIX product insert.