8607
Two rare novel mutations , D811N in exon 20 and R835C in exon 21 , were identified in the first nucleotide - binding fold ( NBF ) , a functionally important region of SUR1 , in one patient each , both heterozygotes .
 SUR1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SUR1