070 F. C. STEWARD AND R. G. S. BIDWELL 
14¢~ PROLINE SUPPLIED 72 HOURS ee) 
IN CONTINUOUS LIGHT. ; 


is 
| 
| 
J-AMINOBUT Y RIC 
ACID 
\s 
< 
oF 
‘PROLINE 12 
SUGAR 23 g 
ecialll oe 
cine GLUTAMIC ACID , 
é 4 
ee... | 
e ASPARTIC . A 
ASPARAGINE ACD 
U : 
i { 
A. | 
14 
C-PROLINE SUPPLIED 72 HRS, IN DARKNESS. 
‘ 
u YU 
1-AMINOBUTYRIC ACID 
ALANINE 
PROLINE 
THREONINE 
GLUTAMIC ACID 
ASPARTIC 
GLUTAMINE ACID 
ASP INE 

B % PHENOL — WATER: 
Fig. 1. Radioautographs of the chromatograms of the alcohol-soluble nitrogen fraction of tobacco 
leaf discs. [@C)proline supplied 72 h (A) in continuous light and (B) in darkness. (U designates 
a radioactive but unidentified spot.) 
References p. 692/693 
