1426
The detection of estrogen and progesterone receptors ( ER and PR ) localized in the cell nucleus can be achieved by the same assay.
 protein: ER; protein: estrogen; protein: PR; protein: progesterone receptors
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: ER, estrogen, PR, progesterone receptors 
Answer:
 protein: ER; protein: estrogen; protein: PR; protein: progesterone receptors