6477
We also show that ectopic expression of PU.1 in Xenopus embryos is sufficient to block erythropoiesis during normal development.
 protein: PU.1
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: PU.1 
Answer:
 protein: PU.1