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The region of plasmid pCM2 encoding the pathogenicity locus pat - 1 was mapped by deletion analysis and complementation studies to a 1 . 5 - kb Bg / II / SmaI DNA fragment .
 pathogenicity locus pat - 1, Bg / II, SmaI
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 pathogenicity locus pat - 1, Bg / II, SmaI