21272
We show a significant correlation between phosphorylation levels of AKt and of PTP1B at Ser 50 ( R ( 2 ) = 0 . 84 , P < . 05 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None