Both Systems Can Be Used To Clean Up DNA Fragments (100-Bp To 10-Kb) From Enzymes, Salts, And DNTPs. PCR AdvancedTM Clean Up System Is A Cheaper Choice For Cleaning Up DNA Fragments In Solution. When A Specific DNA Fragment Is To Be Purified, Gel Electrophoresis Is Needed. A Gel Slice Containing The Desired DNA Fragment Is Excised, And DNA Is Extracted Using Gel AdvancedTM Gel Extraction System.