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DNA
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P.A. Levene Characterizes Nucleic Acids.
P.A. Levene was a biochemist who characterized nucleic acids in DNA. His first discovery was in 1909 and had many more after. He identified all the components of DNA and showed they we linked together. This information helped many scientisits studying DNA after him. -
Fredrick Griffith and Killing Mice
Fredrick Griffith was working on an experiment that had mice being injected with pneumonia. He didn't know it at the time but he was contributing to the discovering what DNA did. Scientists later realized from his experiment that DNA was the molecule of inheritence. -
Genes Come From DNA and Oswald Avery
Avery continued the work of Fredrick Griffith and inheritence. Working with Colin Macleod and Maclyn McCarty, Avery discovered that DNA is where genes and chromosomes come from. -
Chargaff's Rules
Erwin Chargaff was a biochemist that came up with two rules concerning DNA. One rule was that in natural DNA some components are always equal to eachother. His second rule stated that DNA varied by species. His first rule helped find the helix structure in DNA. -
Linus Pauling and a Triple Helix?
Linus Pauling proposed that DNA had a triple helix structure. This made people interested in the structure of DNA. This interest brought in the people to later prove wrong. -
Maurice Wilkins and DNA Threads
Maurice Wilkins discovered it was possible to produce thin threads from DNA. Using X-ray diffraction he discovered that the DNA had a crystal like structure in the threads. This finding helped Crick and Watson with their double helix theorem. -
Hershey and Chase Confirm DNA is Genetic Material.
Hershey and his wife Chase did a series of experiments that helped finally confirm that DNA was genetic material. Now that it was confirmed more research was done to get specific about DNA -
James Watson and the Double Helix
James Watson and his partner Francis Crick used Rosalind Franklin's X-rays of DNA to deduce that DNA's structure was a double helix. He and Crick published papers on it and became famous. Later in life he recieved a Nobel Prize. -
Francis Crick and the Double Helix
Francis Crick and his partner James Watson together proved that DNA had a double helix structure. He and Watson published papers on the topic and were well known for it. They used Rosalind Franklin's X-ray diffraction results to prove it. -
Rosalind Franklin and X-Rays
Rosalind Franklin was an english biophysicist who used X-rays to get images of DNA. By doing this she discovered that DNA had a double helix structure. She contributed by showing everyone the structure of DNA. Now knowing this more research could be done.
