12840
Conversely , polyamine depletion by an ornithine decarboxylase inhibitor enhanced PKB / Akt phosphorylation , but suppressed cell survival .
 Chemical: polyamine; Chemical: ornithine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: polyamine, ornithine 
Answer:
 Chemical: polyamine; Chemical: ornithine