Breaking the cell and nuclear membranes.
Cell lysis
Nuclei acid extraction in DNA
DNA inorganic - salts
Organic - phenol, chloroform
Solid phase - magnetic beads, spin columns
Nuclei acid extraction in RNA
Inorganic - guanidine isothiocyanate
Organic - phenol, chloroform
Solid phase - magnetic beads, spin columns
First isolated DNA from human cells
Friedrich miescher
Demonstrated the semi-conservative replication of DNA using density gradient centrifugation
Matthew meselson and Franklin William stahl
Is a common approach to isolate and purify cell structures for biochemical experiments
Density Gradient ultracentrifugation