strain_id	description	flag	length
NZ_CP019488.1	Sinorhizobium meliloti strain B399 chromosome, complete genome	genbank	3781386
NZ_CP019487.1	Sinorhizobium meliloti strain B399 plasmid pSym, complete sequence	genbank	1573992
NZ_CP019486.1	Sinorhizobium meliloti strain B399 plasmid pSymA, complete sequence	genbank	1117190
