4237
The cDNA clones encode a polypeptide of 657 amino acids with a bHLH ( basic - helix - loop - helix ) domain , characteristic of a large family of transcription factors , and a PAS ( Per - Arnt - Sim ) domain in the amino - terminal half region .
 GENE: PAS; GENE: Per; GENE: Arnt; GENE: Sim
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: PAS; GENE: Per; GENE: Arnt; GENE: Sim