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Furthermore, PML and pRb 105 were co-immunoprecipitated in cellular lysates derived from erythroid precursors indicating that this functional interaction may have a biochemical basis.
 erythroid precursors, PML, pRb 105
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:
 erythroid precursors, PML, pRb 105