18659
In this review these questions will be discussed in view of the crystal structures of prokaryotic members of the three known catalytic types of intramembrane proteases published over the past 7 years .
 None
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:  
Answer:
 None