January E6, 1962

Dr. Kdyuahi Kurahaahi
Znrtitute for Protein Reoearch
Osaka University
36 Joancho Kita-Ku
Odca, Japan

Dear Kiyoshi:

  Thank you very much for your letter. I was wouderful to
hear from you.

  Enclosed are reprints and two preprints of our recent
wrk; one of which is in preea Fn Proceedings of the Kational
Academy of Qafencea), the other in Btocheatical aad Biophysical
Research Ccmnunications.  I am in the midst of writing a few
more papers and I will send mazumcripts when they are finished.

  The work is pretty exciting at this rtage. Currently we
are trying to determine characteriatice of RNA coding units,
auoh a8 the coding ratio, degeneracy, specificity of codiug
uuits, the effect of secondary structure upon the activity of
coding units, etc.  However, there ia 80 much to do that the
work aieems to crawl along; at a mail's pace.  Leon Heppel and
MMiue have been doing some work with us and this has been a
great help.  One other thing that we are trying to do is to
obtain ata estimate of the universality of the code.  It will
be months though before we have really clean data concerning
th_ir question.

  Gordon flew back from Paris last week for a few days and
it wae a lot of funtto see and talk to hfm. Both he and
Millicent are enjoying Paris very much and he is very excited
about the work that he is doing there.  It was wonderful hear-
ing about the gorsip from Paris.  Actually, Bruce and Giovauna
came back fram Paris several weeks ago and we heard quite a bit
about current research goin$ on at Pasteur from them.  They
both had a good time in Gembridge and in Paris.


Dr. Kiyoshi Kurahaohi

Page 2 -

  Mike Yantlolineky Is engag;ed to a Finnish girl - an artist
whom he met this past summr when he was vacatlonfng in Europe.
They expect to be married this aumner.

  Let me know how things are going and give my best regards
to your mother.

Si;ncerely yours,

Harshall W. Niranbarg

NWNtlh