14401
Here we tested whether i2 - mediated inhibition increases with greater abundance of the i2 protein relative to the isoform 1 ( i1 ) enzyme , using the extrahepatic UGT1A7 as a model and a series of 23 human embryonic kidney 293 clonal cell lines expressing variable contents of i1 and i2 proteins .
 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