23523
Phosphorylation on Ser and Thr residues of pannexin1 was increased during potentiation , possibly mediating HC opening .
 Chemical: Ser; Chemical: Thr
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Ser; Chemical: Thr