806
So we think that GCR is more sensitive than the plasma cortisol level to reflect the aging change of the adrenal cortex function .
 protein: GCR
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: GCR