580 BERNARD D. DAVIS 



14. Monod, J., in "Enzymes: Units of Biological Structure and Function", ed. 

 O. H. Gaebler. Academic Press, New York, 7 (1956). 



15. Stein, W. D., and Danielli, J. F., m "Membrane Phenomena". Disc. No. 21 

 of Faraday Soc, 238 (1956). 



16. Bowyer, F., and Widdas, W. F., i)i "Membrane Phenomena". Disc. No. 21 

 of Faraday Soc, 251 (1956). 



17. "Active Transport", Sytnp. Soc. exp. Biol. 8, 118 (1954). 



18. Hokin, L. E., and Hokin, M. R.,jf. biol. Clietn. 234, 1387 (1959). 



19. Post, R. L., Merritt, C. R., Kinsolving, C. R., and Albright, C. D., J. biol. 



Clietn. 235, 1796 (i960). 



