ID_biological	group	group2
s1	YC	young_control
s2	YC	young_control
s3	YC	young_control
s8	YE	young_enriched
s9	YE	young_enriched
s10	YE	young_enriched
s13	OC	old_control
s14	OC	old_control
s15	OC	old_control
s16	OE	old_enriched
s17	OE	old_enriched
s18	OE	old_enriched