3989
It is crucial that these results mirror recent observations indicating that murine adult HPCs transduced with dominant negative ATRA receptor (RAR) gene are immortalized and show a selective blockade of granulocytic differentiation .
 cell type: HPCs; DNA: ATRA receptor (RAR) gene
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: HPCs, ATRA receptor (RAR) gene 
Answer:
 cell type: HPCs; DNA: ATRA receptor (RAR) gene