A western blot cannot be prepared from RNA. Only a protein sample can be run with a western blotting approach. The technique used to visualize RNA on a gel is called northern blotting.

yes the principle of all the three is same .the basic difference lies during probing nd detection .in case of southern blotting DNA is used in nothern rna and in case of western blotting antibodies are ued

No.

Western blotting. When Western blotting is used for identification purposes, proteins from a known organism are used to determine whether a patient's serum contains antibodies.

Western Blotting..

i think :/