[Histonet] enzymes significance?

[mohamed abd el razik]

dear histonetters
as i'm learning HC & IHC i need to know a reference or internet site that could help me to know the significance of different enzymes in tissues?? any help in these!?
a second quistion please i'm trying to locat Alk. Phosphatase in chicken intestine and i found in old reference the steps and reagent used for demonstration of it. i need to know is there a commercially avaliable kits ??? 
please share me your protocols
 
any help will be appreciated
thanx
mohamed