/'. H. J OH S SON, E. H.-C. SIE, AND Y. HAN ED A 217 



fied luciferin of Cypridi)ia aiul Apogon have points in common but 

 are not identical. It stands to reason tliat the Iiiciferases of two such 

 widely different types of organisms are not identical, though their 

 activity towards the sidjstratc of the other organism is indicative 

 of some basic similarity. Other projierties of the Apogon system have 

 been studied, and the details will be published in due course. 



Within the past few years important advances in the biochemistry 

 of liniiinescent systems have been achieved. Yet the actual number 

 of different systems about which any detailed biochemical informa- 

 tion now exists is still only a small fraction of tiie multitude known 

 to biology. As a fascinating, intellectually challenging field of research, 

 bioluminescence offers vast possibilities. 



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