21003
The Na ( + ) - induced binding spectrum showed much weaker amide I / II and heme a changes but had similar shifts assignable to carboxylate and arginine residues .
 Chemical: Na ( + ); Chemical: amide; Chemical: heme a; Chemical: carboxylate; Chemical: arginine
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: amide; Chemical: heme a; Chemical: carboxylate; Chemical: arginine