t;100 



amyral 



Fig. 16. Effect of Amytal on endogenous respiration of Spisula sperma- 

 tozoa. Cells in SW-GG, pH 7.3. Results from 2 preparations. # Amytal on 

 endogenous respiration (Z 02 of about l); O, Amytal in the presence of DNP 

 0.05 mM (Z 02 of 6 and 8). Within the frame, progressive inhibition of mo- 

 tility. 



anfimycine A 



10 ~ 10"' 10" 



Fig. 17. Effect of antimycin A on exogenous respiration of dog sperma- 

 tozoa. Cells in seminal fluid - RP (1:1), with GG, pH 7.3, 3.7 X 10 s 

 cells/ml, Z 02 of 13. Within the frame, progressive inhibition of motility. 



125 



