21243
In many bacteria , a homodimer of structural - maintenance - of - chromosomes proteins associates with two regulatory subunits ( known as ScpA and ScpB ) , assembling a protein complex that plays a crucial role in chromosome organization and segregation .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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