4146
Transcription of FN promoter - chloramphenicol acetyltransferase fusion genes carrying the base substitution in one or more of these G - rich sequences both in vivo and in vitro revealed that the base substitution in any G - rich sequence results in reduction of promoter activity , although the downstream GC box ( GCd ) plays a primary role .
 GENE: FN promoter; GENE: chloramphenicol acetyltransferase
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: FN promoter; GENE: chloramphenicol acetyltransferase