6956
We demonstrate here that a third region encompassing a proline rich sequence within the 33 bp repetitive stretch of LMP1 's C-terminus is required for the activation of Janus kinase 3 ( JAK3 ).
 Janus kinase 3, proline rich sequence, LMP1, C-terminus, JAK3
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:
 Janus kinase 3, proline rich sequence, LMP1, C-terminus, JAK3