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To test for progesterone receptor - mediated activation of transcription in yeast , reporter plasmids were constructed to transform yeast cells expressing PRB or C1C2 receptors .
 GENE: progesterone receptor; GENE: PRB; GENE: C1C2 receptors
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: progesterone receptor; GENE: PRB; GENE: C1C2 receptors