7413
Although the differences between plant and human N - glycans were initially thought to limit the therapeutic potential of plant - derived glycoproteins , several such products have now been tested in the clinic and in some cases the presence of plant glycans has been turned into an advantage because they improve the performance of the protein or confer unique characteristics .
 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