10107
Furthermore, we demonstrated by western blot analysis that neutrophils express an alternatively spliced variant of the pituitary transcription factor Pit-1 , designated Pit-1b .
 Pit-1b, neutrophils, Pit-1, pituitary transcription factor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Pit-1b, neutrophils, Pit-1, pituitary transcription factor