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We discuss the possibility that DNA - protein interactions at homologous nucleotide sequences like those identified in PII are part of a regulatory gene cascade that participates in timing fla gene expression in the C . crescentus cell cycle .
 GENE: fla gene
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: fla gene