2623
In contrast , no change in the level of either p53 or activation of mdm2 protein by p53 was observed in hamster UV61 cells after UV exposure .
 GENE: p53; GENE: mdm2 protein; GENE: p53
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: p53; GENE: mdm2 protein; GENE: p53