ID	Mass	Rel_Abund	length
NC_000936.1_S3	5.13E-10	0.0900009	1000
NC_010429.1_S4	5.13E-10	0.000900009	1000
NC_025708.1_S1	5.13E-10	0.900009	1000
NC_027637.1_S2	5.13E-10	9.00E-05	1000
NC_039057.1_S1	5.13E-10	0.00900009	1000