14917
The MMP - sensitivity of the polymer was examined by incubation with MMP - 2 and MMP - 9 , which yielded complete cleavage of all full - length polymers by 36 hours and 48 hours , respectively , with no observable effect on unmodified SELP .
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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:
 None