comparison of the sensitivity of dna isolated from untreated and mamsa-treated py815 mouse mastocytoma cells to hydrolysis by e.coli 3'-exonuclease iii and phage lambda or phage t7 5'-exonucleases show that the fragments of chromosomal dna produced by mamsa treatment have free 3'-oh termini and blocked 5'-termini .
C0020291
hydrolysis
C0015296
exonucleases