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#. Try to extract DNA from another source. This could get gruesome: likely sources are other bodily fluids (blood, stool, semen -- so, yeah, let's try to stick with buccal cells); or flesh. | #. Try to extract DNA from another source. This could get gruesome: likely sources are other bodily fluids (blood, stool, semen -- so, yeah, let's try to stick with buccal cells); or flesh. | ||
#. Be more rigorous about extracting DNA: use a hook rather than a pipette (though actually the pipette seemed fine) | #. Be more rigorous about extracting DNA: use a hook rather than a pipette (though actually the pipette seemed fine) | ||
#. Investigate more DNA-extraction methods | #. Investigate more DNA-extraction methods | ||
=== 1b. DNA is contaminated by proteins, or by other things which inhibit PCR. === | === 1b. DNA is contaminated by proteins, or by other things which inhibit PCR. === | ||