5160
Unlike most other small G proteins which are expressed ubiquitously , TTF was transcribed only in hemopoietic cells as a 2 . 2 kb transcript .
 small G proteins, TTF
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 small G proteins, TTF