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
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:
 protein: ER; protein: estrogen; protein: PR; protein: progesterone receptors