title: DNase-treated virome of grassland soil
design: Viral-size-fractionation (0.22 um) of fresh soil samples followed by a Dnase incubation to remove extracellular DNA. DNA extraction was performed with the PowerSoil Pro kit (QIAGEN). Whole shotgun metagenomic library was built with the DNA Hyper Prep Kit (Kapa Biosystems-Roche)