8319
Different linkers are illustrated with attention focused on ( i ) the specifics of attachment to the antibody , ( ii ) the polarity of the linker , ( iii ) the trigger on the linker that initiates cleavage from the drug , and ( iv ) the self - immolative spacer that liberates the active payload .
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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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