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The HB9 homeodomain is most similar to that of the Drosophila melanogaster homeobox gene proboscipedia .
 proboscipedia, HB9 homeodomain, Drosophila melanogaster homeobox gene, HB9
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:
 proboscipedia, HB9 homeodomain, Drosophila melanogaster homeobox gene, HB9