ID	group	group2
YCRD1_4	YC	young_control
YCRD2_4	YC	young_control
YCRD3_4	YC	young_control
YERC1_4	YE	young_enriched
YERC2_4	YE	young_enriched
YERC3_4	YE	young_enriched
OCRE10_4	OC	old_control
OCRE11_4	OC	old_control
OCRE12_4	OC	old_control
OERE7_4	OE	old_enriched
OERE8_4	OE	old_enriched
OERE9_4	OE	old_enriched