19380
Furthermore , the multimeric P - EPTX - As1a caused tetanic ' fade ' in muscle tension under high frequency nerve stimulation , and produced a triphasic alteration to neurotransmitter release .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None