16875
Within TALE proteins , tandem 34 - amino acid repeats recognize one base pair each and direct sequence - specific DNA binding through repeat variable di - residues ( RVDs ) .
 Chemical: amino acid
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: amino acid 
Answer:
 Chemical: amino acid