1537
Last , the strategy of using anti - receptor mAbs and small molecule hormone mimics as receptor ligands could be applied to the study of many other heteromeric cell surface receptors .
 Anatomy: cell surface
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities: cell surface 
Answer:
 Anatomy: cell surface