Concept 20 A half DNA ladder is a template for copying the whole.
The annual "degree granting" party of Max Delbrück's phage group held in the house shared by Meselson and Stahl at Caltech. (L-R) Harry Rubin, Max Delbrück, Rene Cohen, Matt Meselson, Frank Stahl.
Frank Stahl and his wife Mary at a party, 1956.
Frank Stahl and his wife Mary. The photo was taken in 1956 by Matt Meselson.
1958 Cold Spring Harbor Laboratory meeting. Frank Stahl answering a question as Max Delbrück looks on.
Franklin Stahl during a recent interview at the University of Oregon, 1999.
1958, Matt Meselson at Caltech.
Matt Meselson and Frank Stahl in Oregon on a walk in the Cascade Mountains, 1984.
Matt Meselson at Harvard, 1999.
Arthur Kornberg, 1970s.
Arthur Kornberg with a class, 1980s.
Arthur Kornberg grew up in the city. As a child, instead of "natural" specimens like leaves or insects, Kornberg collected matchbook covers.
Why would a cell need to have more than one kind of DNA polymerase?
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The annual "degree granting" party of Max Delbrück's phage group held in the house shared by Meselson and Stahl at Caltech. (L-R) Harry Rubin, Max Delbrück, Rene Cohen, Matt Meselson, Frank Stahl.
DNA and proteins are key molecules of the cell nucleus.
One gene makes one protein.
A gene is made of DNA.
Bacteria and viruses have DNA too.
The DNA molecule is shaped like a twisted ladder.
A half DNA ladder is a template for copying the whole.
RNA is an intermediary between DNA and protein.
DNA words are three letters long.
A gene is a discrete sequence of DNA nucleotides.
The RNA message is sometimes edited.
Some viruses store genetic information in RNA.
RNA was the first genetic molecule.
Mutations are changes in genetic information.
Some types of mutations are automatically repaired.