11707
Using this assay, we also showed that Pax-5d was present in nuclear extracts of some (but not all) B-lymphoid lines and interacts with the B-cell-specific activator protein-binding site .
 B-lymphoid lines, Pax-5d, B-cell-specific activator protein-binding site
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:
 B-lymphoid lines, Pax-5d, B-cell-specific activator protein-binding site