15069
Our results have shown that the lower concentrations ( 10 ( - 15 ) - 10 ( - 14 ) M ) of NP decreased the amplitudes of voltage - gated K ( + ) currents ( IKv ) and activated L - type Ca ( 2 + ) currents ( ICa - L ) by reducing half - activation membrane potentials of activation kinetics curves .
 K ( + ), Ca ( 2 + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 K ( + ), Ca ( 2 + )