20292
Their amino acid sequences were related to Martentoxin , which has been characterized from the Chinese scorpion Buthus martenzi Karch and described as both a BKCa and Kv1 . 3 blocker .
 Chemical: amino acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: amino acid