270 



INTRACELLULAR LUMINESCENCE 



responsible for the thermal diminution. The rapidity of the changes 

 in intensity, on either heating or cooling, is indicative of a mobile 

 equilibrium. The simplest interpretation is that an equilibrium exists 

 between the native (active) and denatured (inactive) form of an 

 enzyme essential to the overall process of hght emission. This equi- 



oo 



^ 5 



AH^= 34,000 

 A// = 80,000 

 AS = 266.12 



0.587 e 



66 66 



•C35 



30 



25 



20 



I I I I, 



I I 



15 



I I I I, 



10 5 



I 1,1 I I I 



0.0032 0.0033 0.0034 0.0035 0.0036 



Reciprocal of the absolute temperature 



Fig. 4. Influence of temperature on the intensity of luminescence in A. fischeri. 

 The smooth curve was calculated in accordance with the equation and con- 

 stants as given in the figure. (From Johnson, Eyring, and Polissar, 1954, 

 courtesy of John Wiley & Sons; data of Johnson, Eyring, and Williams, 

 1942.) 



