5195
We show here that BcgI is organized as A ( 2 ) B protomers , with B at its centre , but that these protomers self - associate to assemblies containing several A ( 2 ) B units .
 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