5489
The first concerns devising ligand - oligonucleotide or ligand - carrier moieties that bind with high selectivity to receptors on the cell type of interest and that are efficiently internalized by endocytosis .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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