UNIVERSITAT DES SAARLANDES

II.  Physiologisches Institut
Prof. Dr.  8. Lindemann

665 Homburg (Saar)Xm
   Telefon         Nov. 9, 1971

Prof. Dr.  Marshall Nirenberg

Lab.  of Biochemical Genetics

Natl.  Heart and Lung Institute, N.I.H.

Bethesda, Md.  20014,    USA

Dear Professor Nirenberg,

recently our group got interested inG$tiErane pro-
               \
perties of neuroepithelial cells, neuroblasts and
developing nerve cells. UJe were informed that you
are working in this field since many years. This is
why we should like to ask you to help us with a first
orientation and survey of the literature. In other words:
which review articles and original articles would give
us an idea about what is known and what is missing? Ule
are aware of some work on cultured cells but could not
so far find papers on developing cells in situ.

I hope you will find some time to help us in this
matter and remain with best personal wishes

yours very since ely
-Qp*U*(r