2.6. DNA extraction for buccal swab samples
Volunteer buccal swabs were extracted using the QIAGEN DNA
Investigator kit, following the manufacturer’s protocol ‘Isolation of
Total DNA from Surface and Buccal Swabs’. In brief, 600 mL Buffer
ATL was added to the tip of the buccal swab in a 1.5 mL tube.
300 mL of this incubation was used for the purification process
using the QIAcube and the ‘Isolation of DNA from forensic
casework samples’ protocol. Samples were eluted with 100 mL
of Buffer ATE.