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The NMR solution structure of the copper ( I ) - loaded form of hCCSD1 reported here contributes further to characterization of the copper - transfer mechanism to hSOD1 .
 Chemical: copper ( I )
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: copper ( I )