Eukaryotic expression vectors for the membrane display of single-chain antibodies: their use in the selection of transiently-transfected cells from total populations in culture : Jonathan D. Chesnuta, Marijane Russella, Mei-Ping Changb, Apollo R. Baytana, Ian H. Maxwellb, James P. Hoefflera, aInvitrogen Corporation, 3985, Sorrento Valley Blvd. San Diego, CA 92121, bUniversity of Colorado Health Sciences Center, Division of Medical Oncology, 4200E. 9th Avenue, B-171, Denver, CO 80262, USA