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The CydDC system appears to be the first prokaryotic example of a heterodimeric ABC transport system in which each polypeptide contains both hydrophobic and ATP - binding domains .
 GENE: CydDC system; GENE: heterodimeric ABC transport system
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: CydDC system; GENE: heterodimeric ABC transport system