three target cell types were used : control human embryonic lung cells ( hel ) , transformed hel cells ( cmv-mj-hel-2 ) , and transformed hel cells retrieved from tumors induced in athymic nude mice ( cmv-mj-hel-2 , t-1 ) by injection of cmv-mj-hel-2 cells .
C0024109
hel
C0276253
cmv