4688
Venom fractions were tested in electrophysiological assays on a panel of six K ( + ) channels ( K ( v ) 1 . 1 - 1 . 6 ) by using the two - electrode voltage clamp technique .
 Chemical: K ( + ); Chemical: K
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: K ( + ); Chemical: K