FLUORESCENCE STUDIES OF NUCLEOPROTEINS 



121 



m 



#• 





Fig. 9(a). 



Fig. y(b). 



Fig. 9 — Ultraviolet absorption (a) and autofluoreseence (b) of bone-marrow cells of an 

 irradiated rat (dose 900 r, 4 hr after irradiation). In the upper right hand corner is a 



micronecrotic focus. 



