8782
Serial sectioning of 6 micrometer was performed using a cryostat, and samples were immunohistochemically stained using the streptoavidin -biotin peroxidase method and a monoclonal antibody against c-fos.
 -biotin peroxidase, streptoavidin
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:
 -biotin peroxidase, streptoavidin