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One of the Drosophila sequences , ttk , is a developmental control gene , while a second does not contain a zinc finger region but encodes a structure important in oocyte development .
 Drosophila sequences, developmental control gene, ttk, zinc finger region
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Drosophila sequences, developmental control gene, ttk, zinc finger region