764
Several studies have established that Tat releases an elongation block to the transcription of HIV long terminal repeat ( LTR ); however, it is not known whether this mechanism alone is sufficient to explain the block to HIV replication in human T cells when Tat is absent.
 DNA: LTR; protein: elongation block; DNA: HIV long terminal repeat; protein: Tat; cell type: human T cells; protein: Tat
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: LTR, elongation block, HIV long terminal repeat, Tat, human T cells, Tat 
Answer:
 DNA: LTR; protein: elongation block; DNA: HIV long terminal repeat; protein: Tat; cell type: human T cells; protein: Tat