13328
The results of studies on oocytes show that PKA , NKCC1 , P2X3 receptors , and GABA A receptor - associated protein , etc . , are existing systems that show different reactivity to the GABA A receptors .
 Chemical: GABA; Chemical: GABA
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: GABA; Chemical: GABA