FACS profiles of leukemic cells transformed by E26 and AEV compared with cells from 2-day-old blastoderms.

Leukemic cells were collected from chicks infected with the E26 and AEV viruses, respectively, and purified by Ficoll centrifugation. Blastoderm cells were obtained by dispersing the cells from a pool of day-2 blastoderms by vigorous pipetting and by removing tissue fragments by filtration.