11037
The protein ' s simple topology , which is distinct from the mechanically well - characterized beta - grasp and immunoglobulin ( Ig ) - like folds , in addition to the wide range of structural homologues resulting from its ancient origin , provides an attractive model protein for single - molecule force spectroscopy studies .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None