13189
When levels were semiquantitated using densitometry , significant decreases of TCRzeta (P = 0.029) and p56(lck) (P = 0.029) but not CD3epsilon (P = 0.131), compared with control levels, were found.
 TCRzeta, CD3epsilon, p56(lck)
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:
 TCRzeta, CD3epsilon, p56(lck)