TABLE 6 



The Histochemical Classification of Esterases 



Enzymes 



I. Main types: 



A) Lipase . . . 



B) Esterase. 



Bi) a-esterase . . 

 B2) AS esterase 



C) Cholinester- 

 ase 



II. Intermediate 

 types: 

 A-B 



A-Bi.. 



A-B2. . 

 A-C... 



B-C... 



Bi-C. 

 B2-C.. 

 A-B-C 



Substrates 





+ 



a a 



c 



+ 





+ 



+ 



-to 



+ 



+ 



+ 



+ 

 + 



+ 



+= 



+' 



+ 



+ 



+ 



+ 

 + 



< 

 4) 



J « 



+ 



-to 



± 



+ 



+ 



+ 

 + 



O fd 



+ 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



Examples 



Chief cells of mouse stomach 



Chief cells of rabbit and dog 

 stomach; human renal tu- 

 bules; sympathetic ganglia in 

 several species 



Unidentified cells in the rat 

 heart; ampullary gland of the 

 mouse 



Brunner's glands of the rat; cells 

 of pancreatic islets of rat; mo- 

 tor cells of rabbit and rat; 

 astroglia of cat 



Human adrenal medulla; certain 

 cells and tracts of mouse 

 brain; arborizations around 

 sympathetic ganglion cells in 

 several species 



Chief cells of human stomach; 

 pancreas of rat and mouse 

 (also hydrolyze unsaturated 

 Tweens); bronchial epitheli- 

 um in several species; intersti- 

 tial cells of rat testis 



Duodenal villi of the rat; septal 

 cells of mouse lung 



No examples known 



Spermatic elements of mouse 

 testis 



Muscle spindles of mouse; con- 

 ductive system of dog's heart; 

 Bowman's capsules in dog's 

 kidney 



No examples known 



No examples known 



Pancreas of several species 

 (also hydrolyzes unsaturated 

 Tweens); liver and intestine 

 of several species 



* Pancreas only. 



