11976
None of the substitutions in the ligand-binding domain matched mutations known to influence binding affinity in other species.
 protein: ligand-binding domain
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: ligand-binding domain 
Answer:
 protein: ligand-binding domain