19578
Long - distance trafficking of Jacob from synaptic , but not extrasynaptic , sites depends on ERK activity , and association with fragments of the intermediate filament alpha - internexin hinders dephosphorylation of the Jacob / ERK complex during nuclear transit .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None