Hershey and Chase showed that the introduction of deoxyribonuclease ( referred to as DNase ) into a solution containing the labeled bacteriophages did not introduce any P into the solution .
The introduction of deoxyribonuclease ( referred to as DNase ) is an enzyme that breaks down DNA .
Hershey and Chase showed that the introduction of deoxyribonuclease ( referred to as DNase ) , an enzyme that breaks down DNA , into a solution containing the labeled bacteriophages did not introduce any P into the solution .