4018
Expression of Na ( + ) / I ( - ) symporter ( NIS ( SLC5A5 ) ) , the glycoprotein responsible for iodide transport , has been demonstrated in normal testicular tissue .
 Chemical: Na ( + ); Chemical: I ( - ); Chemical: iodide
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: Na ( + ); Chemical: I ( - ); Chemical: iodide