128
Furthermore , we demonstrate that in myeloid and B cell extracts , PU . 1 forms a novel , specific , more slowly migrating complex ( PU - SF ) when binding the GM - CSF receptor alpha promoter PU . 1 site .
 GENE: PU . 1; GENE: PU - SF; GENE: GM - CSF receptor alpha; GENE: PU . 1
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: PU . 1; GENE: PU - SF; GENE: GM - CSF receptor alpha; GENE: PU . 1