6892
In contrast, virus reactivation was not observed following CD4 oligomerization by antibodies that bind other epitopes in D1 , including the D1/CDR3-loop .
 D1, CD4, D1/CDR3-loop, antibodies
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:
 D1, CD4, D1/CDR3-loop, antibodies