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        Yeast Prep for FACS

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        Yeast Prep for FACS

        [Adapted from Nash et al. EMBO , 7(13):4335-4346; 1988.]
        1. Spin down 1E7 cells in a microfuge tube for 1 minute.

        2. Resuspend pellet in 1 ml of 70% EtOH. Fix for at least 60 minutes at room temperature (or up to several days at 4 deg C). Keep samples on rotator.

        3. Pellet cells (1 minute) and resuspend in 1 ml of 50 mM Na citrate pH 7.0.

        4. Sonicate (30% for 15 sec), pellet, and resuspend in 1 ml of same solution.

        5. Add RNase A to 0.25 mg/ml. Incubate at 50 deg C for 1 hour or overnight at 37 deg C.

        6. Pellet and wash cells. Pellet again and resuspend in 1 ml of Na citrate.

        7. Add propidium iodide to 16 µg/ml (e.g. add 16 µl of 1 mg/ml PI).

        8. Incubate at room temperature for 30 minutes.

        9. Proceed with FACS analysis.
        ~undefined*The_resulting_sample_is_usually_about_10X_too_concentrated_for_analysis_on_the_FHCRC_Becton_Dickinson_machines~E_so_adjust_the_protocol_accordingly_or_dilute_the_final_sample_before_analysis.~Q~K~Hfont~M~2~1~Kp~M~2~1~0 

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