This should precipitate efficiently with sodium acetate (1/10th vol of 3 M) and ethanol (3 vols). Jim James L. Hartley, Ph.D. Life Technologies / Invitrogen, Inc. PO Box 6482 9800 Medical Center Drive Rockville, MD 20849-6482 Tel. 301-610-8337 Fax 301-610-8371 jhartley at lifetech.com ---