6612
PRLR knockdown decreased the rate of GHR proteolytic turnover , yielding GHR protein increase and ensuing sensitization of these cells to GHR signaling events including phosphorylation of GHR , Janus kinase 2 , and signal transducer and activator of transcription 5 ( STAT5 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None