Tube	1A (control)	1B (control)	2A (control)	2B (control)
Aqueous phase	200 µl	200 µl	200 µl	200 µl
3 M sodium acetate, pH 5.2	20 µl	20 µl	20 µl	20 µl
Absolute ethanol	600 µl	600 µl	600 µl	600 µl