ENZYMES — KILBY 285 



must speed up production, and wliich slow it down. The chemical 

 regulators of the body are its hormones, and these must almost cer- 

 tainly act by controlling key enzyme reactions. The first indications 

 that this may be so have been obtained, and it may well be that the 

 major development in biochemistry during the next half century 

 will be a greater understanding of the mechanism of hormone action 

 in terms of enzyme reactions. Much has been achieved in enzymol- 

 ogy, but very much yet remains to be done. It would be an over- 

 confident biochemist wdio would consider himself worthy of the 

 kilogram of gold. 



