1606
We investigated the effect of copper ( Cu ) overload ( 20 - 160 micro M / 24 h ) in two cell lines of human hepatic ( HepG2 ) and pulmonary ( A - 549 ) origin by determining lipid and protein damage and the response of the antioxidant defence system .
 Chemical: copper; Chemical: Cu
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; Chemical: Cu