8736
With the modified membrane BSA was completely blocked when the pH was 7 . 0 , the pI of BHb , while BHb was completely blocked at pH 4 . 7 .
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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