Transformation (genetics)
The results of these experiments were at first sceptically received by the scientific community. Not until the discovery of other methods of genetic transfer (conjugation in 1947 and transduction in 1953) by Joshua Lederberg were Avery's experiments accepted. Transformation did not become routine procedure in laboratories until 1972 when Cohen successfully transformed Escherichia coli by treating the bacteria with calcium chloride. This created an efficient and convenient procedure for transforming bacteria and opened the way for biotechnology and research.