a comparison of the filler dna at these 49 nonimmune system rearrangements with 97 n regions derived from immune system rearrangements suggested that lymphoid and nonlymphoid cells use different mechanisms for insertion of filler dna , as expected from the absence of detectable terminal deoxynucleotidyl transferase in cells from nonlymphoid tissues .
C0000702
a
C0012854
dna