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Insulin - like growth factor II ( IGFII ) is a mitogenic polypeptide , the mRNAs of which are present in multiple forms , despite derivation from a single gene .
 Insulin - like growth factor II, IGFII
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Insulin - like growth factor II, IGFII