5007
In the present study we demonstrate that also the signal transducers and activators of transcription (STAT) family members STAT1 p91 and STAT3 p92 and the product of the c-fps/fes protooncogene become tyrosine -phosphorylated upon GM-CSF stimulation and physically associated with both GM-CSF receptor beta common subunit and JAK2 .
 GM-CSF, GM-CSF, signal transducers and activators of transcription (STAT) family members, c-fps/fes protooncogene, JAK2, STAT3 p92, STAT1 p91
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:
 GM-CSF, GM-CSF, signal transducers and activators of transcription (STAT) family members, c-fps/fes protooncogene, JAK2, STAT3 p92, STAT1 p91