12261
We have now used mutant forms of M6P / IGF2R to assess the relevance of the different ligand - binding sites of the receptor for its biological activities in this cellular system .
 Chemical: M6P
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: M6P