4101
Ligand activation of c-ErbB induced the tyrosine phosphorylation , DNA-binding , and reporter gene transcription of Stat 5b in erythroblasts .
 erythroblasts, reporter gene, Stat 5b, c-ErbB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 erythroblasts, reporter gene, Stat 5b, c-ErbB