Fig. 1.

Metagenomic DNA isolated from garden soil using different methods. M HindIII digested λ DNA marker, a lanes 1–3 Zhou et al. (1996) method, b lanes 4–6 Volossiouk et al. (1995) method, c lanes 7–9 Tsai and Olson (1991) method, d lanes 10–12 Siddhapura et al. (2010) method, e lanes 13–15 Verma and Satyanarayana (2011) method, f lanes 16–18 Singh et al. (2014) method, g lanes 19–21 improved method