3581
Mammalian chromosome ends contain long arrays of TTAGGG repeats that are complexed to a telomere specific protein , the TTAGGG repeat binding factor , TRF1 .
 GENE: TTAGGG repeat binding factor; GENE: TRF1
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: TTAGGG repeat binding factor; GENE: TRF1