10607
Collectively , these experiments demonstrate that CFTR ' s NBF1 + R region and its NBF2 domain , after folding separately as distinct units , have a strong propensity to interact and that this interaction is stable in the absence of added nucleotides or exogenously induced phosphorylation .
 CFTR ' s NBF1 + R region, NBF2 domain
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CFTR ' s NBF1 + R region, NBF2 domain