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Here we describe the characterization of cDNAs encoding two unusual E2Fs , E2F - 4 and E2F - 5 , each identified by the ability of their gene product to interact with p130 in a yeast two - hybrid system .
 GENE: E2Fs; GENE: E2F - 4; GENE: E2F - 5; GENE: p130
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: E2Fs; GENE: E2F - 4; GENE: E2F - 5; GENE: p130