i extracted DNA from human blood by phenol. i think this result is not good, but i don’t known clearly, i tried many time but still the same, can you give some opinion. please, see the image I show in here. thank you very much.
DNA looks good. There is some problem with electrophoresis. Probably you overloaded (too much DNA) and thus the wierd appearance of your bands. Try to load little bid less of sample and use lower voltage. stain the gel after electrophoresis, not before.