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To test whether or not SOCS - 3 also binds to the IGFIR , we cloned human SOCS - 3 by reverse transcription - polymerase chain reaction from human skeletal muscle mRNA .
 SOCS - 3, IGFIR, human SOCS - 3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SOCS - 3, IGFIR, human SOCS - 3