16308
The recombinant APP - IP - TIMP - 2 showed strong inhibitory activity toward MMP - 2 ( Ki ( app ) = 0 . 68 pm ) , whereas its inhibitory activity toward MMP - 1 , MMP - 3 , MMP - 7 , MMP - 8 , MMP - 9 , or MT1 - MMP was six orders of magnitude or more weaker ( IC50 > 1 mu m ) .
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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