4103
Activation of the erythropoietin receptor caused specific DNA-binding of Stat 5b , but failed to induce reporter gene transcription .
 protein: Stat 5b; DNA: reporter gene; protein: erythropoietin receptor
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: Stat 5b, reporter gene, erythropoietin receptor 
Answer:
 protein: Stat 5b; DNA: reporter gene; protein: erythropoietin receptor