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We have demonstrated that a putative HOX cofactor , PBX1A , participates in cooperative DNA binding with HOXA - 1 and the Deformed group protein HOXD - 4 .
 GENE: HOX cofactor; GENE: PBX1A; GENE: HOXA - 1; GENE: Deformed; GENE: HOXD - 4
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: HOX cofactor; GENE: PBX1A; GENE: HOXA - 1; GENE: Deformed; GENE: HOXD - 4