11161
We identified , using western blotting and PCR that N - 38 neurons express full - length 66kDa ER alpha and a 52kDa ER alpha spliced variant missing the fourth exon - ER alpha Delta 4 .
 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