1353
Deletion analysis of rOC promoter - chloramphenicol acetyltransferase constructs demonstrates that an AML - 1 - binding sequence within the proximal promoter ( - 138 to - 130 nt ) contributes to 75 % of the level of osteocalcin gene expression .
 GENE: rOC promoter; GENE: chloramphenicol acetyltransferase; GENE: AML - 1 - binding sequence; GENE: osteocalcin gene
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: rOC promoter; GENE: chloramphenicol acetyltransferase; GENE: AML - 1 - binding sequence; GENE: osteocalcin gene