3532
The activity ( 50 % inhibition = 500 microM ) of the tetrapeptide KRDS ( residues 39 - 42 ) , which has already been described , was at least 25 - times and 16000 - times lower than the activity of the octodecapeptide and of the lactotransferrin molecules , respectively .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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