previously , we have shown that a subgenomic fraction , which we called ta dna ( 'tumor-activated dna ' ) was preferentially expressed in all human tumor cells ( hanania et al. , proc . natl . acad . sci . u.s.a. , 78 ( 1981 ) 6504-6508 ; hanania et al , embo j. , 2 ( 1983 ) 1621-1624 ) .
C0012854
dna
C0012930
tumor