title: YL21_4_2 (CRX986258; CRA012027)
library_construction_protocol: DNA was extracted using a DNeasy PowerMax Soil Kit (QIAGEN, Corp., Germany), following the manufacturer's instructions.The V3_V4 region of the bacterial 16S rRNA gene was amplified using the primer set 338F (5_ACTCCTACGGGAGGCAGCAG_3) and 806R (5_GGACTACHVGGGTWTCTAAT_3).