7022
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.
 cell type: erythroid precursors; protein: PML; protein: pRb 105
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: erythroid precursors, PML, pRb 105 
Answer:
 cell type: erythroid precursors; protein: PML; protein: pRb 105