2453
A synthetic thrombin receptor agonist peptide ( TRP ) of 7 residues ( SFLLRNP ) was found to be as effective as thrombin for [ Ca2+ ]i mobilization, and both agonists induced Ca2+ release exclusively from internal stores .
 thrombin receptor, thrombin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 thrombin receptor, thrombin