3042
The endogenous mRNA levels of copper influx transporter CTR1 were found to be significantly reduced in the knockdown cells , and exogenous expression of CTR1 restored their sensitivity to cDDP .
 Chemical: copper
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