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A portion of Region II also resembles part of the human c - jun oncoprotein ' s leucine zipper , which in turn , has been demonstrated to be the heterodimerization site between the jun and fos oncoproteins .
 GENE: c - jun; GENE: jun; GENE: fos oncoproteins
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: c - jun; GENE: jun; GENE: fos oncoproteins