His research and experiments led him to the conclusion that the mainstream membrane pump theory of the living cell was not correct .
From 1950 - 1953 Ling worked as an instructor at the Medical School of the Johns Hopkins University in Baltimore .
Ling 's research and experiments led him to the conclusion that the mainstream membrane pump theory of the living cell was not correct .
From 1950 - 1953 Ling worked as an instructor at the Medical School of the Johns Hopkins University in Baltimore .