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To explore the functional properties of the protein encoded by neu , we created a fusion gene that joins the cytoplasmic domain of neu to the extracellular portion of an immunoglobulin heavy chain .
 GENE: neu; GENE: neu; GENE: immunoglobulin heavy chain
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: neu, neu, immunoglobulin heavy chain 
Answer:
 GENE: neu; GENE: neu; GENE: immunoglobulin heavy chain