4010
With respect to arginine residues , only the two single mutations of R-276 and R-394 to alanine showed a dramatic decrease of agonist and antagonist binding whereas the R272A mutation showed only a slight effect.
 None
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:  
Answer:
 None