2356
Finally a 10 - nucleotide region flanking the exon 4 protein - binding site is homologous to instability elements within five other transcripts , suggesting that a common coding region determinant may exist .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None