19224
Fortunately , the available information regarding the connexin sequence , secondary and tertiary structure , and their biochemical and physiological properties permits the development of strategies to block exclusively the hemichannel activity exclusively , with no effect on gap junction activity .
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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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