name this method of determining very small amounts of protein in tissues or cells, the companion of Northern and Southern.
The sample is first subjected to electrophoresis on SDS-polyacrylamide gel before being released onto a polymer sheet. By adding a radioactively- labeled antibody specific for the target protein, one can screen a large number of bacterial colonies for cDNA clones to facilitate the manufacturing of that protein. FTP,  name this method of determining very small amounts of protein in tissues or cells, the companion of Northern and Southern.
The sample is first subjected to electrophoresis on SDS-polyacrylamide gel before being released onto a polymer sheet.
{Western blotting}