1081
The role of HIV tat , which is the main enhancing factor for viral LTR , in the regulation of IL - 2 gene transcription has been studied following transient expression of the tat gene in phorbol ester and calcium ionophore - activated Jurkat cells transfected with IL - 2 promoter - chloramphenicol acetyltransferase reporter constructs .
 GENE: HIV tat; GENE: viral LTR; GENE: IL - 2 gene; GENE: tat gene; GENE: IL - 2; 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: HIV tat; GENE: viral LTR; GENE: IL - 2 gene; GENE: tat gene; GENE: IL - 2; GENE: chloramphenicol acetyltransferase