596 



Lester Packer 



Figure 2. Restoration of reversible scattering 

 changes in aged chloroplasts "by ATP. 



250 



i- 



:§ 200 

 id 



CD 



c 



o 

 u 



r 150 



o 

 O 



100 



LIGHT ON 



6 

 Minutes 



10 



Figure 3- Incomplete reversal of chloroplast scat- 

 tering under conditions of ATP hydrolysis. Conditions 

 as in figure 1 plus cysteine (0.08 M), and ATP (2 iM) . 

 ADP (2 i*l) in one experiment and KH^Cl (2 ml.l) in the 

 other were added as shovm. 



