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Transgenic expression of SCRB15 in the middle silk gland using the binary GAL4 - UAS expression system enhanced selective beta - carotene uptake by the middle silk gland , while transgenic expression of Cameo2 enhanced selective lutein uptake under the same GAL4 driver .
 Chemical: beta - carotene; Chemical: lutein
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: beta - carotene; Chemical: lutein