7609
These elements comprise a binding site for Krox proteins , one for nuclear factor 1 , an octamer motif that binds POU - homeodomain proteins , and a novel TN control element .
 GENE: Krox proteins; GENE: nuclear factor 1; GENE: POU - homeodomain proteins; GENE: TN control element
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: Krox proteins, nuclear factor 1, POU - homeodomain proteins, TN control element 
Answer:
 GENE: Krox proteins; GENE: nuclear factor 1; GENE: POU - homeodomain proteins; GENE: TN control element