1026
Mutation of the AP1 motif in the context of the intron enhancer was shown to decrease enhancer-mediated activation of the promoter in both pre-B cells induced with LPS and constitutive expression in mature B cells .
 DNA: intron enhancer; DNA: AP1 motif; cell type: pre-B cells; cell type: mature B cells
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: intron enhancer, AP1 motif, pre-B cells, mature B cells 
Answer:
 DNA: intron enhancer; DNA: AP1 motif; cell type: pre-B cells; cell type: mature B cells