749
Rex is a phosphoprotein found in the cell nucleolus , whose function may be regulated by its localization and phosphorylation .
 protein: Rex; protein: phosphoprotein
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: Rex; protein: phosphoprotein