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To determine cis - acting elements controlling the rat B - 50 / GAP - 43 gene expression , the genomic DNA encoding exon 1 and the 5 ' flanking sequence was isolated .
 GENE: B - 50; GENE: GAP - 43
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: B - 50; GENE: GAP - 43