experiments designed ( 1 ) to detect structures at the 5 ' ends of phosphatase-treated nascent dna molecules that caused them to be resistant to hydrolysis by spleen exonuclease or ( 2 ) to detect polypeptides that were associated covalently with small dna molecules and could be iodinated with the bolton-hunter reagent did not yield positive results .
C0031678
phosphatase
C0020291
hydrolysis