DNA time line

DNA travels through time.

Period: Jan 1, 1920 to Jan 1, 1963

DNA time line

P.A. Levene- Nucleotides

Dec 11, 1920

He analyzed the components of the DNA molecule. He came to the conclusion that the nucleotides was composed of a base attached to a sugar and that phosphate also attached to the sugar.

Fredrick Griffith- Transforming Principle

Dec 11, 1928

published a paper that showed that a nonpathogenic strain of the bacterium Streptococcus pneumonaie could be induced to take on the disease-causing characteristics of a different strain. This finding lead to the formation of the Transforming principle.

Citation (read this)

Dec 12, 1936

I got all of my reasearch either from www.nnbd.com or DNA interactive. i tried to insert a link but it wouldnt show up. and im not sure if it worked or not. so i just wanted to make sure that you knew i cited all of my sources

Oswald Avery- Transforming Factor

Dec 11, 1944

conducted a series of experiments using strains of pneumococcus bacteria and discovered the transforming factor

Francis Crick-DNA structure

Dec 11, 1950

He was the cofounder of the structure of DNA

James Watson - DNA structure

Dec 12, 1950

Was another co-founder of DNA along with Francis Crick and Maurice Wilkins

Erwin Chargaff

Dec 11, 1952

believed that there had to be more to dna than just simple repetitive tetrenucleotide blocks. he isolated DNA from different organisms and measured the levels of each of the four nitrogen bases

Rosalind Franklin – X-ray diffraction

Dec 11, 1952

produced x-ray crystallography pictures of BDNA which watson and crick used to determine the structures of double stranded DNA

Linus Pauling

Dec 11, 1952

He proposed to the world a triple stranded helix structure for DNA

Hershey and Chase- blender experiment

Dec 12, 1953

conducted the hershey chase blender experiment that proved phage DNA and not protein was the genetic materialconducted the hershey chase blender experiment that proved phage DNA and not protein was the genetic material

Maurice Wilkins

Dec 12, 1962

Took X-ray pictures of the DNA, when other well known scientists used his discoveries to build an accurate model of the DNA and later won a nobel prize in Physiology and Medicine.