A unique combination of PCR products and a number of proprietary plasmids digested with appropriate restriction enzymes to yield 12 fragments, suitable for use as molecular weight standards for agarose gel electrophoresis. The DNA includes fragments ranging from 100-3,000 base pairs. The 500 and 1,500 base pair bands have increased intensity to serve as reference points. The approximate mass of DNA in each band is provided (0.54 μg a load) for approximating the mass of DNA in comparably intense samples of similar size.

Source : PCR products and double-stranded DNA digested with appropriate restriction enzymes are phenol extracted and equilibrated to 10 mM Tris-HCl (pH 8.0) and 10mM EDTA.

Reaction Setup: 5 μl / well ( **Containing orange G & xylene cyanol FF as tracking dyes. )

Range : 100-3,000 bp

Number of bands : 12


Storage :

Stable for up to 6 months at 25°C.
Stable for up to 12 months at 4°C.
Stable for up to 24 months at -20°C.

Figure 1. Agarose gel electrophoresis of DNA ladders. This is a storage test for the DNA ladder samples of different lot. numbers which were stored at -20°C specifically since 2016, 2017, 2018, 2019 and 2021 till the test date. As the photo presented, the oldest and latest produced DNA ladder are still functioning the same despite the long storage period. The photo proves the shelf life of this product is as the protocol claimed.