For simplicity one can think of the + class as having one extra base at some point or other in the genetic message and the - class as having one too few.

thesis; Watson also had other work such as trying to obtain crystals of myoglobin for X-ray diffraction experiments. 15 July 1951) and Jacqueline Marie-Therese [later Nichols] (b. 34 nanometre) intervals in DNA.

Crick was an important theoretical molecular biologist and played a crucial role in research related to revealing the genetic code. Kieckhefer DistinguiFrancis Crickd Research Professor at the Salk Institute for Biological Studies in La Jolla California. He is widely known for use of the term "central dogma" to summarize an idea that genetic information flow in cells is essentially one-way from DNA to RNA to protein.