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Using the electrophoretic mobility shift assay , at least six novel octamer binding proteins were detected in nuclear extracts of cultured mouse astrocytes .
 cell type: cultured mouse astrocytes; protein: octamer binding proteins
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell type: cultured mouse astrocytes; protein: octamer binding proteins