Original Repository: Oregon State University. Library. Ava Helen and Linus Pauling Papers
Reproduced with permission of the Ava Helen and Linus Pauling Papers. Oregon State University Library.
The Search for the Molecular Helix
Two Nobel Prizes
August 29, 1951
Dear Dr. Perutz:
I thank you for your letter of August 17. Professor Corey and I have been very pleased that you should have found the 1.5
spacing in fibrous proteins of the a-keratin type. In one of our papers we had mentioned it, as observed by MacArthur for
porcupine quill tip. Your recognition of the presence of this reflection as a rather reliable indication of the presence of
the 3.7-residue helix seems to me to be very important.
I am not at all sure that this helix is present in feather rachis. However, Professor Corey and I have pointed out in a short
article that will appear in Nature that the absence of this reflection does not eliminate this helix, since the two chains
proposed for the unit could be just a phase with one another.
Professor Corey and I have found some new sheet structures--two new pleated sheets, which will be described in Proceedings
of the National Academy of Sciences, and another sheet of a new type, which we call a rippled sheet.
P.S. We enjoyed Kendrew's visit very much. I wish that you could come to see us sometime.