Identification of Griffiths transforming principle

1931 Henry Dawson - Repeats Griffith's Experiments and develops assay that does not require mice.
1933 Lional Allway - Demonstrated that a soluble extract of IIS cells would transform IIR cells.
1944 Avery, MacLeod and McCarty - Identified Griffith's Transforming Principle. CD

Eliminate Polysaccharides -->Transformation Occurs
Eliminate Lipids -->Transformation Occurs
Eliminater RNA -->Transformation Occurs
Eliminate Protein -->Transformation Occurs
Eliminate DNA -->Transformation Does Not Occurs:

Therefore DNA is the Transforming Principle Summary.