we have repaired dna containing ap sites with an ap endonuclease ( e. coli endonuclease iv or the chromatin ap endonuclease from rat liver ) , a dna polymerase devoid of 5 ' -- -- 3 ' exonuclease activity ( klenow polymerase or rat liver dna polymerase beta ) and a dna ligase .
C0012892
dna
C0525039
dna polymerase beta