1611
Consistent with this model , a synthetic construct containing three tandem copies of the native LDL receptor SREBP site linked to a single Sp1 site was also significantly activated in a buttonhead - independent fashion .
 GENE: LDL receptor; GENE: SREBP; GENE: Sp1 site; GENE: buttonhead
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: LDL receptor; GENE: SREBP; GENE: Sp1 site; GENE: buttonhead