Supplemental data 4. 16S and gyrB forward and reverse primers
V4_515F	GTGYCAGCMGCCGCGGTAA
V4_806R	GGACTACNVGGGTWTCTAAT
F_Bt_330_350	CGGAGGTAARTTCGAYAAAGG
R_Bt_918_938	GCRTATTTYTTCARHGTACGG