10320
The cop region also harbors a region of plasmid incompatibility , inc , encompassing a stem - loop structure , the repA promoter , Prep , as well as two distinct RepA binding sites , BD - 1 and BD - 2 .
 cop region, inc, repA promoter, Prep, RepA binding sites
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 cop region, inc, repA promoter, Prep, RepA binding sites